“Earliest Known Ancestors” at Family Tree DNA in 3 Easy Steps

Why should you take the time to complete the information about your earliest known ancestor, your EKA, at Family Tree DNA?

The answer is simple – because it helps you with your genealogy and it helps others too. Genealogy, and in particular, genetic genealogy is by definition a team sport. It takes at least two to test and match – and the more, the merrier. From there, it’s all about information sharing.

Maybe the easiest way to illustrate the benefit of providing Earliest Known Ancestor information is by showing what happens if you DON’T complete the EKA field.

To be direct, you lose important opportunities to work with other genealogists and, if others don’t complete their EKA, you also lose the opportunity to see who their earliest known ancestors are. This information, when viewing your Y and mitochondrial DNA matches, shows immediately who is from your genetic line. It can also help you break down brick walls to push your own EKA back a few generations. I’ve used this tactic, successfully, repeatedly with both Y and mitochondrial DNA.

Earliest Known Ancestors Are Used 7 Ways

  • Matches – Every Y and mitochondrial DNA match displays your matches’ Earliest Known Ancestor

Here’s what your matches look like if they don’t complete their EKA information.

eka match.png

How depressing to see blanks listed for the Earliest Known Ancestor for your matches. These are exact full sequence mitochondrial matches, but no ancestors listed. A few do have trees, as indicated by the blue pedigree icon, but the ability to quickly view a list of ancestors would be so beneficial.

Looking at the matches for one of my Estes male cousins, below, you can see a much more helpful example.

eka complete

You may see a genealogical line you recognize. Or, several you don’t which may serve as a huge hint.

eka project.png

  • Surname and other types of projects, meant to attract more testers, also suffer when Earliest Known Ancestors and Countries of Origin, when known, aren’t completed.
  • Matches Maps – Another place where your Earliest Known Ancestor information will help is on the Matches Map which displays the location of your matches Earliest Known Ancestors, available for both Y DNA tests and mitochondrial DNA tests as well as Family Finder.

eka matches map

Looking for clusters of matches can be very revealing and can point your research in a specific direction. Genetic clues are indispensable, as is the information about the earliest ancestors of your matches. I am clearly related to these clusters of people in Scandinavia – but it’s up to me to figure out how, and when. It would be very useful to know of any of them share the same EKA.

Additional places where your EKA is utilized to provide information about your ancestry include:

  • Ancestral Origins: A page provided for both Y and mtDNA results where locations of your matches’ EKA are shown.
  • Haplogroup Origins: A page provided for both Y and mtDNA where locations of your haplogroup are found.

eka origins.jpg

I wrote about Ancestral Origins and Haplogroup Origins, here, and here, with lots of examples.

I wrote about the Y tree, here, which shows locations for each haplogroup. An article about the mitochondrial tree can be found here. These are the most comprehensive trees available, anyplace, and they are completely free and accessible to anyone, whether they have tested at FamilyTreeDNA or not. Science at work.

That’s 7 different ways your Earliest Known Ancestor information can benefit you – and others too.

However, this information can’t be utilized unless testers complete their EKA information.

Here’s how to enter your EKA information.

How Do You Complete Your Earliest Known Ancestor Information?

Your ancestor information lives in three separate places at FamilyTreeDNA – and they are not all interconnected meaning they don’t necessarily feed each other bidirectionally.

The information is easy to complete. We will step through each location and how to update your information.

What is Direct Paternal and Direct Maternal?

Before we go any further, let’s take just a minute and define these two terms.

When completing Earliest Known Ancestor information, you’ll be asked for your “Direct Paternal Ancestor” and “Direct Maternal Ancestor.” This does NOT mean the oldest person on each side, literally. Some people interpret that to mean the furthest person back on that side of your family. That’s NOT what it means either.

Your direct paternal ancestor is the furthest person in your tree on your father’s, father’s father’s direct paternal line. In other words, your most distant patrilineal ancestor.

Your direct maternal ancestor is the further person in your tree on your mother’s mother’s mother’s direct maternal line. This is your most distant matrilineal ancestor.

eka maternal paternal.png

In this view of my cousin’s tree, Holman Estes is the Earliest Known Ancestor on the paternal, meaning patrilineal, line. Of course, that’s also the Y DNA inheritance path too.

Sarah Jones is the Earliest Known Ancestor on the maternal, or matrilineal line. Mitochondria DNA descends down the matrilineal line.

The home person in this tree inherited the Y DNA of Holman Estes (and his patrilineal ancestors) and the mitochondrial DNA of Sarah Jones (and her matrilineal ancestors.)

Ok, let’s put this information to work.

Step 1 – Earliest Known Ancestor

When you sign on, click on the down arrow beside your name on the upper right hand corner of your personal page.

eka account settings

Click on “Account Settings.”

On the “Account Settings” page, click on “Genealogy,” then on “Earliest Known Ancestors.”

eka eka.png

In our example, above, the tester has completed the Direct Paternal Ancestor information, but not the Direct Maternal Ancestor.

Note that “Country of Origin” and “Location” are somewhat different. Location can mean something as specific as a city, county or region, along with map coordinates.

Country of Origin can mean something different.

To select a location and to complete your ancestor’s information, click on “Update Location.” If you don’t click on “Update Location,” you’ll need to save this form before exiting.

When you click on “Update Location,” the system takes you to the Matches Map screen where you can easily plot ancestral locations.

eka plot locations

In our example, we see that our tester has already entered his paternal EKA, Nicholas Ewstes in Deal, in the UK. We don’t need to do anything to that information, but we need to add a Maternal Location.

Click on “Edit Location”

eka update locations.png

You’ll see a screen where you can click to edit either the Maternal or Paternal Location. In this case, I’m selecting Maternal.

eka step 2

Enter the name of your ancestor. I tend to enter more information that will uniquely identify her to someone looking at their match list, such as when and where she lived.

eka more.png

If there’s room, I could also add “m 1849 Hayesville, Ohio to John Parr” which would further uniquely identify Sarah – especially given that her surname is Jones. If a match sees “Sarah Jones,” that doesn’t provide much context, but “Sarah Jones married in 1849 in Hayesville, Ohio to James Parr,” even if the tester doesn’t provide a tree, gives the match something to sink their teeth into.

When finished, click “Next.”

eka step 3

Enter the location and press “Search.” Longitude and latitude will be filled in for you.

eka select.png

Click “Select” if this is the correct location.

eka step 4

By changing the location name here, you could enter a historical name, for example, if the location name has changed since your ancestor lived there.

eka exit.png

You’ll see the final information before you Save and Exit.

eka both

You’ll view the map with your direct paternal ancestor and direct maternal ancestor both shown with pins on your map. This is before matching, of course.

Now, if you look back at the Direct Maternal Ancestor field under Account Settings, you’ll see the information you entered on the map, except for the Country of Origin.

eka direct maternal.png

This information doesn’t feed backwards into the EKA “Country of Origin” field, because country of origin can mean different things.

For example, my cousin’s direct maternal ancestor’s location would be United States because that’s where she lived. But is it where her line originated?

eka unknown origin

When looking at the Country of Origin dropdown box, you can see that United States can actually mean different things.

  1. Does it mean she was born here and we know her ancestors were European or African, but the specific country is uncertain?
  2. Does it mean her ancestors were Native American – and if so, do we actually know that, or is it yet unproven oral history?
  3. Or does United States simply mean that my cousin’s genealogy is stuck in Ohio?

In his case, it means stuck in Ohio. The mitochondrial haplogroup of this woman’s direct matrilineal descendants and her Matches Map tells us that her ancestors were European in origin, not Native or African.

In his case, “Unknown Origin” is not inaccurate, but by making that selection, other people won’t know if the tester really doesn’t know, or if they simply forgot to enter a location. I generally enter “United States” when the US is where I’m stuck.

Please note that the actual geographic location, including longitude and latitude, does populate from map selections.

When exiting the Direct Maternal or Direct Paternal Ancestors page, always click on the orange Save button, or it won’t.

Step 2 – Matches Map

You’ve already had a preview of this functionality in Step 1.

eka y matches map.png

The second way to populate EKA information is to select Matches Map directly from the menu on your personal page at Family Tree DNA.

eka pins

click to enlarge

I clicked on Matches Map from my cousin’s Y DNA page, so we’ll see his Y DNA Matches displayed. These pins displayed on his map are there because his matches entered their Earliest Known Ancestor information. The different colors indicate the relative closeness of matches.

His white pin that shows his own ancestor is displayed behind several other men’s pins (red arrow at right) who have also tracked their Y DNA ancestor to Deal, England and match the tester.

My cousin can update or enter his EKA information by clicking on “Update Ancestor’s Location” (red arrow at bottom) where a box allowing him to select between Paternal and Maternal will be displayed.

Please note that every pin on this map has an associated match that can be displayed by either mousing over the individual pins or by clicking on “Show Match List” in the bottom left corner.

Step 3 – Trees

Be sure to upload your tree too.

eka pedigree.png

Y DNA and mitochondrial DNA match pedigree icons looks like this, indicating your match has uploaded or created a tree.

eka pedigree ff

The Family Finder pedigree icon will be blue if a tree is provided and greyed out otherwise.

Always check your match’s tree because sometimes the Earliest Known Ancestor and the earliest ancestor in your match’s tree are not the same person.

Additional research may have been completed, but regardless of the reason for a discrepancy, you want to view the most distant person in that line.

Sometimes people get confused about who belongs in the Earliest Known Ancestor field, so a tree check is always a good idea.

  • Hint: If you see a male in the maternal field, you know they are confused. Same for a female in the paternal field.

To create or upload a GEDCOM file click on “myTree” at the top of your personal page.

download ancestry ftdna

Then, select your choice of creating a tree manually or uploading a GEDCOM file that you already created elsewhere.

eka create tree.png

If you need to download a tree from Ancestry to upload to FamilyTreeDNA, I wrote about how to do that, here.

Whether you upload or create a tree, choose yourself (assuming it’s your test, or select the person whose DNA test it is) as the home person in the tree.

eka home person

Bonus – Ancestral Surnames

Once your tree is uploaded, if you have NOT previously entered your Ancestral Surnames (under Account Settings,) uploading a GEDCOM file will populate the surnames, but not just with your direct ancestral lines. It populates ALL of the surnames from your tree. This isn’t a feature that I want. I recommend adding only direct line surnames manually or from a spreadsheet. If you have a small tree or don’t mind having surname matches not in your direct line, then allowing the surnames to auto-populate is probably fine.

eka surnames.png

If you’re wondering how Ancestral Surnames are used, the two Family Finder matches below illustrate the benefits.

eka surname list

When you have matching surnames in common, they float to the top of the list and are bolded. The first match matches the tester and they bothhave those bolded surnames in their trees.

With no matching surnames, the list is still present, but no bolding, as shown in the second match.

eka surname bold.png

You can then click on the ancestral surnames to see all of the surnames listed by that match.

If you search for matches that include a specific surname on Family Finder, that surname is displayed blue, the common surnames are bolded, and the rest aren’t.

eka surname search

By looking at these common ancestral surnames, I can often tell immediately how I’m related to my match.

eka surname blue.png

Summary

Using Earliest Known Ancestors, Matches Maps and Ancestral Surnames at Family Tree DNA is as easy a 1-2-3 and well worth the effort.

If you provided this information previously, is it still up to date? For your kit and any others you manage?

What hints are waiting for you?

Have other people uploaded their trees or added EKAs since you last checked?

You can always send an email to your matches who need to add Earliest Known Ancestors by clicking on the envelope icon. Feel free to provide them with a link to this article that explains the benefits of entering their EKA information along with step-by-step instructions.

DNA is the gift that just keeps on giving – but it can give a lot more with Earliest Known Ancestors and their locations!

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Concepts: Inheritance

Inheritance.

What is it?

How does it work?

I’m not talking about possessions – but about the DNA that you receive from your parents, and their parents.

The reason that genetic genealogy works is because of inheritance. You inherit DNA from your parents in a known and predictable fashion.

Fortunately, we have more than one kind of DNA to use for genealogy.

Types of DNA

Females have 3 types of DNA and males have 4. These different types of DNA are inherited in various ways and serve different genealogical purposes.

Males Females
Y DNA Yes No
Mitochondrial DNA Yes Yes
Autosomal DNA Yes Yes
X Chromosome Yes, their mother’s only Yes, from both parents

Different Inheritance Paths

Different types of DNA are inherited from different ancestors, down different ancestral paths.

Inheritance Paths

The inheritance path for Y DNA is father to son and is inherited by the brother, in this example, from his direct male ancestors shown by the blue arrow. The sister does not have a Y chromosome.

The inheritance path for the red mitochondrial DNA for both the brother and sister is from the direct matrilineal ancestors, only, shown by the red arrow.

Autosomal DNA is inherited from all ancestral lines on both the father’s and mother’s side of your tree, as illustrated by the broken green arrow.

The X chromosome has a slightly different inheritance path, depending on whether you are a male or female.

Let’s take a look at each type of inheritance, how it works, along with when and where it’s useful for genealogy.

Autosomal DNA

Autosomal DNA testing is the most common. It’s the DNA that you inherit from both of your parents through all ancestral lines back in time several generations. Autosomal DNA results in matches at the major testing companies such as FamilyTreeDNA, MyHeritage, Ancestry, and 23andMe where testers view trees or other hints, hoping to determine a common ancestor.

How does autosomal DNA work?

22 autosomes

Every person has two each of 22 chromosomes, shown above, meaning one copy is contributed by your mother and one copy by your father. Paired together, they form the two-sided shape we are familiar with.

For each pair of chromosomes, you receive one from your father, shown with a blue arrow under chromosome 1, and one from your mother, shown in red. In you, these are randomly combined, so you can’t readily tell which piece comes from which parent. Therein lies the challenge for genealogy.

This inheritance pattern is the same for all chromosomes, except for the 23rd pair of chromosomes, at bottom right, which determined the sex of the child.

The 23rd chromosome pair is inherited differently for males and females. One copy is the Y chromosome, shown in blue, and one copy is the X, shown in red. If you receive a Y chromosome from your father, you’re a male. If you receive an X from your father, you’re a female.

Autosomal Inheritance

First, let’s talk about how chromosomes 1-22 are inherited, omitting chromosome 23, beginning with grandparents.

Inheritance son daughter

Every person inherits precisely half of each of their parents’ autosomal DNA. For example, you will receive one copy of your mother’s chromosome 1. Your mother’s chromosome 1 is a combination of her mother’s and father’s chromosome 1. Therefore, you’ll receive ABOUT 25% of each of your grandparents’ chromosome 1.

Inheritance son daughter difference

In reality, you will probably receive a different amount of your grandparent’s DNA, not exactly 25%, because your mother or father will probably contribute slightly more (or less) of the DNA of one of their parents than the other to their offspring.

Which pieces of DNA you inherit from your parents is random, and we don’t know how the human body selects which portions are and are not inherited, other than we know that large pieces are inherited together.

Therefore, the son and daughter won’t inherit the exact same segments of the grandparents’ DNA. They will likely share some of the same segments, but not all the same segments.

Inheritance maternal autosomalYou’ll notice that each parent carries more of each color DNA than they pass on to their own children, so different children receive different pieces of their parents’ DNA, and varying percentages of their grandparents’ DNA.

I wrote about a 4 Generation Inheritance Study, here.

Perspective

Keep in mind that you will only inherit half of the DNA that each of your parents carries.

Looking at a chromosome browser, you match your parents on all of YOUR chromosomes.

Inheritance parental autosomal

For example, this is me compared to my father. I match my father on either his mother’s side, or his father’s side, on every single location on MY chromosomes. But I don’t match ALL of my father’s DNA, because I only received half of what he has.

From your parents’ perspective, you only have half of their DNA.

Let’s look at an illustration.

Inheritance mom dad

Here is an example of one of your father’s pairs of chromosomes 1-22. It doesn’t matter which chromosome, the concepts are the same.

He inherited the blue chromosome from his father and the pink chromosome from his mother.

Your father contributed half of his DNA to you, but that half is comprised of part of his father’s chromosome, and part of his mother’s chromosome, randomly selected in chunks referred to as segments.

Inheritance mom dad segments

Your father’s chromosomes are shown in the upper portion of the graphic, and your chromosome that you inherited from you father is shown below.

On your copy of your father’s chromosome, I’ve darkened the dark blue and dark pink segments that you inherited from him. You did not receive the light blue and light pink segments. Those segments of DNA are lost to your line, but one of your siblings might have inherited some of those pieces.

Inheritance mom dad both segments

Now, I’ve added the DNA that you inherited from your Mom into the mixture. You can see that you inherited the dark green from your Mom’s father and the dark peach from your Mom’s mother.

Inheritance grandparents dna

These colored segments reflect the DNA that you inherited from your 4 grandparents on this chromosome.

I often see questions from people wondering how they match someone from their mother’s side and someone else from their father’s side – on the same segment.

Understanding that you have a copy of the same chromosome from your mother and one from your father clearly shows how this happens.

Inheritance match 1 2

You carry a chromosome from each parent, so you will match different people on the same segment. One match is to the chromosome copy from Mom, and one match is to Dad’s DNA.

Inheritance 4 gen

Here is the full 4 generation inheritance showing Match 1 matching a segment from your Dad’s father and Match 2 matching a segment from your Mom’s father.

Your Parents Will Have More Matches Than You Do

From your parents’ perspective, you will only match (roughly) half of the DNA with other people that they will match. On your Dad’s side, on segment 1, you won’t match anyone pink because you didn’t inherit your paternal grandmother’s copy of segment 1, nor did you inherit your maternal grandmother’s segment 1 either. However, your parents will each have matches on those segments of DNA that you didn’t inherit from them.

From your perspective, one or the other of your parents will match ALL of the people you match – just like we see in Match 1 and Match 2.

Matching you plus either of your parents, on the same segment, is exactly how we determine whether a match is valid, meaning identical by descent, or invalid, meaning identical by chance. I wrote about that in the article, Concepts: Identical by…Descent, State, Population and Chance.

Inheritance on chromosomes 1-22 works in this fashion. So does the X chromosome, fundamentally, but the X chromosome has a unique inheritance pattern.

X Chromosome

The X chromosome is inherited differently for males as compared to females. This is because the 23rd pair of chromosomes determines a child’s sex.

If the child is a female, the child inherits an X from both parents. Inheritance works the same way as chromosomes 1-22, conceptually, but the inheritance path on her father’s side is different.

If the child is a male, the father contributes a Y chromosome, but no X, so the only X chromosome a male has is his mother’s X chromosome.

Males inherit X chromosomes differently than females, so a valid X match can only descend from certain ancestors on your tree.

inheritance x fan

This is my fan chart showing the X chromosome inheritance path, generated by using Charting Companion. My father’s paternal side of his chart is entirely blank – because he only received his X chromosome from his mother.

You’ll notice that the X chromosome can only descend from any male though his mother – the effect being a sort of checkerboard inheritance pattern. Only the pink and blue people potentially contributed all or portions of X chromosomes to me.

This can actually be very useful for genealogy, because several potential ancestors are immediately eliminated. I cannot have any X chromosome segment from the white boxes with no color.

The X Chromsome in Action

Here’s an X example of how inheritance works.

Inheritance X

The son inherits his entire X chromosome from his mother. She may give him all of her father’s or mother’s X, or parts of both. It’s not uncommon to find an entire X chromosome inherited. The son inherits no X from his father, because he inherits the Y chromosome instead.

Inheritance X daughter

The daughter inherits her father’s X chromosome, which is the identical X chromosome that her father inherited from his mother. The father doesn’t have any other X to contribute to his daughter, so like her father, she inherits no portion of an X chromosome from her paternal grandfather.

The daughter also received segments of her mother’s X that her mother inherited maternally and paternally. As with the son, the daughter can receive an entire X chromosome from either her maternal grandmother or maternal grandfather.

This next illustration ONLY pertains to chromosome 23, the X and Y chromosomes.

Inheritance x y

You can see in this combined graphic that the Y is only inherited by sons from one direct line, and the father’s X is only inherited by his daughter.

X chromosome results are included with autosomal results at both Family Tree DNA and 23andMe, but are not provided at MyHeritage. Ancestry, unfortunately, does not provide segment information of any kind, for the X or chromosomes 1-22. You can, however, transfer the DNA files to Family Tree DNA where you can view your X matches.

Note that X matches need to be larger than regular autosomal matches to be equally as useful due to lower SNP density. I use 10-15 cM as a minimum threshold for consideration, equivalent to about 7 cM for autosomal matches. In other words, roughly double the rule of thumb for segment size matching validity.

Autosomal Education

My blog is full of autosomal educational articles and is fully keyword searchable, but here are two introductory articles that include information from the four major vendors:

When to Purchase Autosomal DNA Tests

Literally, anytime you want to work on genealogy to connect with cousins, prove ancestors or break through brick walls.

  • Purchase tests for yourself and your siblings if both parents aren’t living
  • Purchase tests for both parents
  • Purchase tests for all grandparents
  • Purchase tests for siblings of your parents or your grandparents – they have DNA your parents (and you) didn’t inherit
  • Test all older generation family members
  • If the family member is deceased, test their offspring
  • Purchase tests for estimates of your ethnicity or ancestral origins

Y DNA

Y DNA is only inherited by males from males. The Y chromosome is what makes a male, male. Men inherit the Y chromosome intact from their father, with no contribution from the mother or any female, which is why men’s Y DNA matches that of their father and is not diluted in each generation.

Inheritance y mtdna

If there are no adoptions in the line, known or otherwise, the Y DNA will match men from the same Y DNA line with only small differences for many generations. Eventually, small changes known as mutations accrue. After many accumulated mutations taking several hundred years, men no longer match on special markers called Short Tandem Repeats (STR). STR markers generally match within the past 500-800 years, but further back in time, they accrue too many mutations to be considered a genealogical-era match.

Family Tree DNA sells this test in 67 and 111 marker panels, along with a product called the Big Y-700.

The Big Y-700 is the best-of-class of Y DNA tests and includes at least 700 STR markers along with SNPs which are also useful genealogically plus reach further back in time to create a more complete picture.

The Big Y-700 test scans the entire useful portion of the Y chromosome, about 15 million base pairs, as compared to 67 or 111 STR locations.

67 and 111 Marker Panel Customers Receive:

  • STR marker matches
  • Haplogroup estimate
  • Ancestral Origins
  • Matches Map showing locations of the earliest known ancestors of matches
  • Haplogroup Origins
  • Migration Maps
  • STR marker results
  • Haplotree and SNPs
  • SNP map

Y, mitochondrial and autosomal DNA customers all receive options for Advanced Matching.

Big Y-700 customers receive, in addition to the above:

  • All of the SNP markers in the known phylotree shown publicly, here
  • A refined, definitive haplogroup
  • Their place on the Block Tree, along with their matches
  • New or unknown private SNPs that might lead to a new haplogroup, or genetic clan, assignment
  • 700+ STR markers
  • Matching on both the STR markers and SNP markers, separately

Y DNA Education

I wrote several articles about understanding and using Y DNA:

When to Purchase Y DNA Tests

The Y DNA test is for males who wish to learn more about their paternal line and match against other men to determine or verify their genealogical lineage.

Women cannot test directly, but they can purchase the Y DNA test for men such as fathers, brothers, and uncles.

If you are purchasing for someone else, I recommend purchasing the Big Y-700 initially.

Why purchase the Big Y-700, when you can purchase a lower level test for less money? Because if you ever want to upgrade, and you likely will, you have to contact the tester and obtain their permission to upgrade their test. They may be ill, disinterested, or deceased, and you may not be able to upgrade their test at that time, so strike while the iron is hot.

The Big Y-700 provides testers, by far, the most Y DNA data to work (and fish) with.

Mitochondrial DNA

Inheritance mito

Mitochondrial DNA is passed from mothers to both sexes of their children, but only females pass it on.

In your tree, you and your siblings all inherit your mother’s mitochondrial DNA. She inherited it from her mother, and your grandmother from her mother, and so forth.

Mitochondrial DNA testers at FamilyTreeDNA receive:

  • A definitive haplogroup, thought of as a genetic clan
  • Matching
  • Matches Map showing locations of the earliest know ancestors of matches
  • Personalized mtDNA Journey video
  • Mutations
  • Haplogroup origins
  • Ancestral origins
  • Migration maps
  • Advanced matching

Of course, Y, mitochondrial and autosomal DNA testers can join various projects.

Mitochondrial DNA Education

I created a Mitochondrial DNA page with a comprehensive list of educational articles and resources.

When to Purchase Mitochondrial DNA Tests

Mitochondrial DNA can be valuable in terms of matching as well as breaking down brick walls for women ancestors with no surnames. You can also use targeted testing to prove, or disprove, relationship theories.

Furthermore, your mitochondrial DNA haplogroup, like Y DNA haplogroups, provides information about where your ancestors came from by identifying the part of the world where they have the most matches.

You’ll want to purchase the mtFull sequence test provided by Family Tree DNA. Earlier tests, such as the mtPlus, can be upgraded. The full sequence test tests all 16,569 locations on the mitochondria and provides testers with the highest level matching as well as their most refined haplogroup.

The full sequence test is only sold by Family Tree DNA and provides matching along with various tools. You’ll also be contributing to science by building the mitochondrial haplotree of womankind through the Million Mito Project.

Combined Resources for Genealogists

You may need to reach out to family members to obtain Y and mitochondrial DNA for your various genealogical lines.

For example, the daughter in the tree below, a genealogist, can personally take an autosomal test along with a mitochondrial test for her matrilineal line, but she cannot test for Y DNA, nor can she obtain her paternal grandmother’s mitochondrial DNA directly by testing herself.

Hearts represent mitochondrial DNA, and stars, Y DNA.

Inheritance combined

However, our genealogist’s brother, father or grandfather can test for her father’s (blue star) Y DNA.

Her father or any of his siblings can test for her paternal grandmother’s (hot pink heart) mitochondrial DNA, which provides information not available from any other tester in this tree, except for the paternal grandmother herself.

Our genealogist’s paternal grandfather, and his siblings, can test for his mother’s (yellow heart) mitochondrial DNA.

Our genealogist’s maternal grandfather can test for his (green star) Y DNA and (red heart) mitochondrial DNA.

And of course, it goes without saying that every single generation upstream of the daughter, our genealogist, should all take autosomal DNA tests.

So, with several candidates, who can and should test for what?

Person Y DNA Mitochondrial Autosomal
Daughter No Y – can’t test Yes, her pink mother’s Yes – Test
Son Yes – blue Y Yes, his pink mother’s Yes – Test
Father Yes – blue Y Yes – his magenta mother’s Yes – Test
Paternal Grandfather Yes – blue Y – Best to Test Yes, his yellow mother’s – Test Yes – Test
Mother No Y – can’t test Yes, her pink mother’s Yes – Test
Maternal Grandmother No Y – can’t test Yes, her pink mother’s – Best to Test Yes – Test
Maternal Grandfather Yes – green Y – Test Yes, his red mother’s – Test Yes – Test

The best person/people to test for each of the various lines and types of DNA is shown bolded above…assuming that all people are living. Of course, if they aren’t, then test anyone else in the tree who carries that particular DNA – and don’t forget to consider aunts and uncles, or their children, as candidates.

If one person takes the Y and/or mitochondrial DNA test to represent a specific line, you don’t need another person to take the same test for that line. The only possible exception would be to confirm a specific Y DNA result matches a lineage as expected.

Looking at our three-generation example, you’ll be able to obtain a total of two Y DNA lines, three mitochondrial DNA lines, and 8 autosomal results, helping you to understand and piece together your family line.

You might ask, given that the parents and grandparents have all autosomally tested in this example, if our genealogist really needs to test her brother, and the answer is probably not – at least not today.

However, in cases like this, I do test the sibling, simply because I can learn and it may encourage their interest or preserve their DNA for their children who might someday be interested. We also don’t know what kind of advances the future holds.

If the parents aren’t both available, then you’ll want to test as many of your (and their) siblings as possible to attempt to recover as much of the parents’ DNA, (and matches) as possible.

Your family members’ DNA is just as valuable to your research as your own.

Increase Your Odds

Don’t let any of your inherited DNA go unused.

You can increase your odds of having autosomal matches by making sure you are in all 4 major vendor databases.

Both FamilyTreeDNA and MyHeritage accept transfers from 23andMe and Ancestry, who don’t accept transfers. Transferring and matching is free, and their unlock fees, $19 at FamilyTreeDNA, and $29 at MyHeritage, respectively, to unlock their advanced tools are both less expensive than retesting.

You’ll find easy-to-follow step-by-step transfer instructions to and from the vendors in the article DNA File Upload-Download and Transfer Instructions to and from DNA Testing Companies.

Order

You can order any of the tests mentioned above by clicking on these links:

Autosomal:

Transfers

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Genetic Affairs: AutoPedigree Combines AutoTree with WATO to Identify Your Potential Tree Locations

July 2020 Update: Please note that Ancestry issues a cease-and-desist order against Genetic Affairs, and this tool no longer works at Ancestry. The great news is that it still works at the other vendors, and you can ask Ancestry matches to transfer, which is free.

If you’re an adoptee or searching for an unknown parent or ancestor, AutoPedigree is just what you’ve been waiting for.

By now, we’re all familiar with Genetic Affairs who launched in 2018 with their signature autocluster tool. AutoCluster groups your matches into clusters by who your matches match with each other, in addition to you.

browser autocluster

A year later, in December 2019, Genetic Affairs introduced AutoTree, automated tree reconstruction based on your matches trees at Ancestry and Family Finder at Family Tree DNA, even if you don’t have a tree.

Now, Genetic Affairs has introduced AutoPedigree, a combination of the AutoTree reconstruction technology combined with WATO, What Are the Odds, as seen here at DNAPainter. WATO is a statistical probability technique developed by the DNAGeek that allows users to review possible positions in a tree for where they best fit.

Here’s the progressive functionality of how the three Genetic Affairs tools, combined, function:

  • AutoCluster groups people based on if they match you and each other
  • AutoTree finds common ancestors for trees from each cluster
  • Next, AutoTree finds the trees of all matches combined, including from trees of your DNA matches not in clusters
  • AutoPedigree checks to see if a common ancestor tree meets the minimum requirement which is (at least) 3 matches of greater to or equal to 30-40 cM. If yes, an AutoPedigree with hypotheses is created based on the common ancestor of the matching people.
  • Combined AutoPedigrees then reviews all AutoTrees and AutoPedigrees that have common ancestors and combine them into larger trees.

Let’s look at examples, beginning with DNAPainter who first implemented a form of WATO.

DNA Painter

Let’s say you’re trying to figure out how you’re related to a group of people who descend from a specific ancestral couple. This is particularly useful for someone seeking unknown parents or other unknown relationships.

DNA tools are always from the perspective of the tester, the person whose kit is being utilized.

At DNAPainter, you manually create the pedigree chart beginning with a common couple and creating branches to all of their descendants that you match.

This example at DNAPainter shows the matches with their cM amounts in yellow boxes.

xAutoPedigree DNAPainter WATO2

The tester doesn’t know where they fit in this pedigree chart, so they add other known lines and create hypothesis placeholder possibilities in light blue.

In other words, if you’re searching for your mother and you were born in 1970, you know that your mother was likely born between 1925 (if she was 45 when she gave birth to you) and 1955 (if she was 15 when she gave birth to you.) Therefore, in the family you create, you’d search for parents who could have given birth to children during those years and create hypothetical children in those tree locations.

The WATO tool then utilizes the combination of expected cMs at that position to create scores for each hypothesis position based on how closely or distantly you match other members of that extended family.

The Shared cM Project, created and recently updated by Blaine Bettinger is used as the foundation for the expected centimorgan (cM) ranges of each relationship. DNAPainter has automated the possible relationships for any given matching cM amount, here.

In the graphic above, you can see that the best hypothesis is #2 with a score of 1, followed by #4 and #5 with scores of 3 each. Hypothesis 1 has a score of 63.8979 and hypothesis 3 has a score of 383.

You’ll need to scroll to the bottom to determine which of the various hypothesis are the more likely.

Autopedigree DNAPainter calculated probability

Using DNAPainter’s WATO implementation requires you to create the pedigree tree to test the hypothesis. The benefit of this is that you can construct the actual pedigree as known based on genealogical research. The down-side, of course, is that you have to do the research to current in each line to be able to create the pedigree accurately, and that’s a long and sometimes difficult manual process.

Genetic Affairs and WATO

Genetic Affairs takes a different approach to WATO. Genetic Affairs removes the need for hand entry by scanning your matches at Ancestry and Family Tree DNA, automatically creating pedigrees based on your matches’ trees. In addition, Genetic Affairs automatically creates multiple hypotheses. You may need to utilize both approaches, meaning Genetic Affairs and DNAPainter, depending on who has tested, tree completeness at the vendors, and other factors.

The great news is that you can import the Genetic Affairs reconstructed trees into DNAPainter’s WATO tool instead of creating the pedigrees from scratch. Of course, Genetic Affairs can only use the trees someone has entered. You, on the other hand, can create a more complete tree at DNAPainter.

Combining the two tools leverages the unique and best features of both.

Genetic Affairs AutoPedigree Options

Recently, Genetic Affairs released AutoPedigree, their new tool that utilizes the reconstructed AutoTrees+WATO to place the tester in the most likely region or locations in the reconstructed tree.

Let’s take a look at an example. I’m using my own kit to see what kind of results and hypotheses exist for where I fit in the tree reconstructed from my matches and their trees.

If you actually do have a tree, the AutoTree portion will simply be counted as an equal tree to everyone else’s trees, but AutoPedigree will ignore your tree, creating hypotheses as if it doesn’t exist. That’s great for adoptees who may have hypothetical trees in progress, because that tree is disregarded.

First, sign on to your account at Genetic Affairs and select the AutoPedigree option for either Ancestry or Family Tree DNA which reconstructs trees and generates hypotheses automatically. For AutoPedigree construction, you cannot combine the results from Ancestry and FamilyTreeDNA like you can when reconstructing trees alone. You’ll need to do an AutoPedigree run for each vendor. The good news is that while Ancestry has more testers and matches, FamilyTreeDNA has many testers stretching back 20 years or so in the past who passed away before testing became available at Ancestry. Often, their testers reach back a generation or two further. You can easily transfer Ancestry (and other) results to Family Tree DNA for free to obtain more matches – step-by-step instructions here.

At Genetic Affairs, you should also consider including half-relations, especially if you are dealing with an unknown parent situation. Selecting half-relationships generates very large trees, so you might want to do the first run without, then a second run with half relationships selected.

AutoPedigree options

Results

I ran the program and opened the resulting email with the zip file. Saving that file automatically unzips for me, displaying the following 5 files and folders.

Autopedigree cluster

Clicking on the AutoCluster HTML link reveals the now-familiar clusters, shown below.

Autopedigree clusters

I have a total of 26 clusters, only partially shown above. My first peach cluster and my 9th blue cluster are huge.

Autopedigree 26 clusters

That’s great news because it means that I have a lot to work with.

autopedigree folder

Next, you’ll want to click to open your AutoPedigree folder.

For each cluster, you’ll have a corresponding AutoPedigree file if an AutoPedigree can be generated from the trees of the people in that cluster.

My first cluster is simply too large to show successfully in blog format, so I’m selecting a smaller cluster, #21, shown below with the red arrow, with only 6 members. Why so small, you ask? In part, because I want to illustrate the fact that you really don’t need a lot of matches for the AutoPedigree tool to be useful.

Autopedigree multiple clusters

Note also that this entire group of clusters (blue through brown) has members in more than one cluster, indicated by the grey cells that mean someone is a member of at least 2 clusters. That tells me that I need to include the information from those clusters too in my analysis. Fortunately, Genetic Affairs realizes that and provides a combined AutoPedigree tool for that as well, which we will cover later in the article. Just note for now that the blue through brown clusters seem to be related to cluster 21.

Let’s look at cluster 21.

autopedigree cluster 21

In the AutoPedigree folder, you’ll see cluster files when there are trees available to create pedigrees for individual clusters. If you’re lucky, you’ll find 2 files for some clusters.

autopedigree ancestors

At the top of each cluster AutoPedigree file, Genetic Affairs shows you the home couple of the descendant group shown in the matches and their corresponding trees.

Autopedigree WATO chart

Image 1 – click to enlarge

I don’t expect you to be able to read everything in the above pedigree chart, just note the matches and arrows.

You can see three of my cousins who match, labeled with “Ancestry.” You also see branches that generate a viable hypothesis. When generating AutoPedigrees, Genetic Affairs truncates any branches that cannot result in a viable hypothesis for placing the tester in a viable location on the tree, so you may not see all matches.

Autopedigree hyp 1

Image 2 – click to enlarge

On the top branch, you’ll see hyp-1-child1 which is the first hypothesis, with the first child. Their child is hyp-2- child2, and their child is hyp-3-child3. The tester (me, in this case) cannot be the persons shown with red flags, called badges, based on how I match other people and other tree information such as birth and death dates.

Think of a stoplight, red=no, green are your best bets and the rest are yellow, meaning maybe. AutoPedigree makes no decisions, only shows you options, and calculated mathematically how probable each location is to be correct.

Remember, these “children,” meaning hypothesis 1-child 1 may or may not have actually existed. These relationships are hypothetical showing you that IF these people existed, where the tester could appear on the tree.

We know that I don’t fit on the branch above hypothesis 1, because I only match the descendant of Adam Lentz at 44.2 cM which is statistically too low for me to also inhabit that branch.

I’ve included half relationships, so we see hyp-7-child1-half too, which is a half-sibling.

The rankings for hypotheses 1, 2, and 7 all have red badges, meaning not possible, so they have a score of 0. Hypothesis 3 and 8 are possible, with a ranking of 16, respectively.

autopedigree my location

Image 3 – click to enlarge

Looking now at the next segment of the tree, you see that based on how I match my Deatsman and Hartman cousins, I can potentially fit in any portion of the tree with green badges (in the red boxes) or yellow badges.

You can also see where I actually fit in the tree. HOWEVER, that placement is from AutoTree, the tree reconstruction portion, based on the fact that I have a tree (or someone has a tree with me in it). My own tree is ignored for hypothesis generation for the AutoPedigree hypothesis generation portion.

Had my first cousins once removed through my grandfather John Ferverda’s brother, Roscoe, tested AND HAD A TREE, there would have been no question where I fit based on how I match them.

autopedigree cousins

As it turns out they did test, but provided no tree meaning that Genetic Affairs had no tree to work with.

Remember that I mentioned that my first cluster was huge. Many more matches mean that Genetic Affairs has more to work with. From that cluster, here’s an example of a hypothesis being accurate.

autopedigree correct

Image 4 – click to enlarge

You can see the hypothetical line beneath my own line, with hypothesis 104, 105, 106, 107, 108. The AutoTree portion of my tree is shown above, with my father and grandparents and my name in the green block. The AutoPedigree portion ignores my own tree, therefore generating the hypothesis that’s where I could fit with a rank of 2. And yes, that’s exactly where I fit in the tree.

In this case, there were some hypotheses ranked at 1, but they were incorrect, so be sure to evaluate all good (green) options, then yellow, in that order.

Genetic Affairs cannot work with 23andMe results for AutoPedigree because 23andMe doesn’t provide or support trees on their site. AutoClusters are integrated at MyHeritage, but not the AutoTree or AutoPedigree functions, and they cannot be run separately.

That leaves Family Tree DNA and Ancestry.

Combined AutoPedigree

After evaluating each of the AutoPedigrees generated for each cluster for which an AutoPedigree can be generated, click on the various cluster combined autopedigrees.

autopedigree combined

You can see that for cluster 1, I have 7 separate AutoPedigrees based on common ancestors that were different. I have 3 AutoPedigrees also for cluster 9, and 2 AutoPedigrees for 15, 21, and 24.

I have no AutoPedigrees for clusters 2, 3, 5, 6, 7, 8, 14, 17, 18, and 22.

Moving to the combined clusters, the numbers of which are NOT correlated to the clusters themselves, Genetic Affairs has searched trees and combined ancestors in various clusters together when common ancestors were found.

Autopedigree multiple clusters

Remember that I asked you to note that the above blue through brown clusters seem to have commonality between the clusters based on grey cell matches who are found in multiple groups? In fact, these people do share common ancestors, with a large combined AutoPedigree being generated from those multiple clusters.

I know you can’t read the tree in the image that follows. I’m only including it so you’ll see the scale of that portion of my tree that can be reconstructed from my matches with hypotheses of where I fit.

autopedigree huge

Image 5 – click to enlarge

These larger combined pedigrees are very useful to tie the clusters together and understand how you match numerous people who descend from the same larger ancestral group, further back in time.

Integration with DNAPainter

autopedigree wato file

Each AutoPedigree file and combined cluster AutoPedigree file in the AutoPedigree folder is provided in WATO format, allowing you to import them into DNAPainter’s WATO tool.

autopedigree dnapainter import

You can manually flesh out the trees based on actual genealogy in WATO at DNAPainter, manually add matches from GEDmatch, 23andMe or MyHeritage or matches from vendors where your matches trees may not exist but you know how your match connects to you.

Your AutoTree Ancestors

But wait, there’s more.

autopedigree ancestors folder

If you click on the Ancestors folder, you’ll see 5 options for tree generations 3-7.

autopedigree ancestor generations

My three-generation auto-generated reconstructed tree looks like this:

autopedigree my tree

Selecting the 5th generation level displays Jacob Lentz and Frederica Ruhle, the couple shown in the AutoCluster 21 and AutoPedigree examples earlier. The color-coding indicates the source of the ancestors in that position.

Autopedigree expanded tree

click to enlarge

You will also note that Genetic Affairs indicates how many matches I have that share this common ancestor along with which clusters to view for matches relevant to specific ancestors. How cool is this?!!

Remember that you can also import the genetic match information for each AutoTree cluster found at Family Tree DNA into DNAPainter to paint those matches on your chromosomes using DNAPainter’s Cluster Auto Painter.

If you run AutoCluster for matches at 23andMe, MyHeritage, or FamilyTreeDNA, all vendors who provide segment information, you can also import that cluster segment information into DNAPainter for chromosome painting.

However, from that list of vendors, you can only generate AutoTrees and AutoPedigrees at Family Tree DNA. Given this, it’s in your best interest for your matches to test at or upload their DNA (plus tree) to Family Tree DNA who supports trees AND provides segment information, both, and where you can run AutoTree and AutoPedigree.

Have you painted your clusters or generated AutoTrees? If you’re an adoptee or looking for an unknown parent or grandparent, the new AutoPedigree function is exactly what you need.

Documentation

Genetic Affairs provides complete instructions for AutoPedigree in this newsletter, along with a user manual here, and the Facebook Genetic Affairs User Group can be found here.

I wrote the introductory article, AutoClustering by Genetic Affairs, here, and Genetic Affairs Reconstructs Trees from Genetic Clusters – Even Without Your Tree or Common Ancestors, here. You can read about DNAPainter, here.

Transfer your DNA file, for free, from Ancestry to Family Tree DNA or MyHeritage, by following the easy instructions, here.

Have fun! Your ancestors are waiting.

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

 

MyHeritage: Brand New Theories of Family Relativity

MyHeritage has run their Theories of Family Relativity (abbreviated sometimes as TOFR) software again, refreshing their database, which means more Theories of Family Relativity for DNA testers.

According to the MyHeritage blog:

The number of DNA Matches that include a theory increased by 42.5% from 9,964,321 to 14,201,731.

Sometimes we arrive at a theory through multiple paths, indicating a strong theory and providing additional supporting evidence. After the previous update, there were a total of 115,106,944 paths. This update increased the number of paths by 40.5% to 161,762,761.

The number of MyHeritage users who now have at least one Theory of Family Relativity™ for their DNA Matches has increased by 33.6%.

I’m SOOO glad I added all of those branches to my tree, including all children and grandchildren of my ancestors. Every piece of information is utilized in developing Theories.

I sure hope I have new Theories. Let’s see.

My New Theories

Yay, under DNA Matches, I have the purple banner that indicates there are new Theories waiting for me.

Theories new.png

I can just click on View Theories to see all of the TOFR, including new ones.

Theories 65.png

You can see that clicking on the “View theories” button filters my matches to only those matches who have Theories. I have 65 matches, many of whom will have multiple Theories for me to evaluate. That’s an increase from 52 Theories previously, or a 20% increase.

New Theories result from people who have tested or transferred since TOFR was last run in July 2019. Some will be people who can now connect because someone’s tree or research documents now provide enough information to suggest a common ancestor – which of course is the foundation of Theories for DNA matches.

You can sort by new matches, but there isn’t a way to see only your new Theories of Family Relativity. That’s OK, because I make notes on each person with whom I have a Theory, plus I keep a separate spreadsheet.

Theories notes.png

Matches with notes show up with a purple note box. “No notes” have no color, so it’s easy to click through my TOFR matches pages, looking for TOFR matches with no color. Those are new TOFR matches.

Are the New Theories Accurate?

Theories with DNA matches are formed based on a combination of your tree, your matches tree, other people’s trees, community resource trees like FamilySearch, plus various documents like census records that tie people together.

The reason multiple Theories exist for the same match is because there are different possibilities in terms of how you and your match might be related or how different trees might tie you together. In some cases, Theories will be for different lines that you share with the same person.

Each Theory has a confidence calculation that weighs the reliability of each theory connecting segment based on internal parameters. As you can see below, this connection is given a 50% probability weight of being accurate. You can click on that percentage to review the match and comparative data.

Theories weight.png

click to enlarge

Path 1 of my first new Theory is accurate, even though birth and death dates of Ann McKee’s husband are different at FamilySearch.

Theoreis multiple trees.png

click to enlarge

Looking further down this tree, you can see that my match had only extended their tree through Roxie, but a FamilySearch tree spanned the generations between Roxie and our common couple, Charles Speak and Ann McKee.

My tree didn’t extend down far enough to include Roxie.

Of the other 4 paths/Theories, 3 simply connect at different levels in the same basic trees, meaning that I connect at Margaret Claxton instead of Ann McKee.

The 5th path, however, is ambiguous and I can’t tell if it’s accurate or not. It doesn’t matter though, because I have 4 different solid paths connecting me and my new match.

Theories can connect people with almost no tree. One man had a total of 7 people in his tree, yet through multiple connections, we were connected accurately as 5th cousins.

One accurate Theory combined a total of 6 trees to piece together the Theory.

Working the Theories

I stepped through each match, making notes about each Theory, confirming the genealogy, checking for additional surnames that might indicate a second (or third or fourth) line, as well as SmartMatches.

SmartMatches only occur if the same people are found in both trees. I had no SmartMatches this time, because each of these Theories was more complex and required multiple tree hops to make the connection.

One match was a duplicate upload. After eliminating that from the totals, I have the following results for my newly generated Theories of Family Relativity.

Scorecard

Match Total Theories/Paths Accuracy Comments
1 5 4 yes, 1 ambiguous
2 3 Not exactly, but close Close enough that I could easily discern the common ancestor
3 2 Yes
4 5 Yes
5 1 Not exactly, but close Within 1 generation
6 1 No Acadian, needs additional research
7 5 Yes, but 2 with issues 2 were accurate, 2 with ancestor’s first wife erroneously as mother, and one with private mother
8 2 Not exactly, but close Within 1 generation, also, 2 separate lines
9 2 Yes
10 4 Not exactly, but close Within 1 generation
11 5 Yes One wife shown as unknown
12 3 Not exactly, but close Within 1 generation, also 4 separate common lines in total
Total 38 23 yes, 1 ambiguous, 13 close, 1 no

All of the close matches were extremely easy to figure out, except one in a heavily endogamous population with many “same name” people. That one needs additional research.

I’m not at all unhappy with the Theories that weren’t spot on because Theories are meant to be research hints, and they got me to the end goal of identifying our common ancestor.

I wrote about how to use Theories, in detail, here.

Observations and Commentary

Theories of Family Relativity has been run by MyHeritage for the third time now. It doesn’t run all the time, so new testers and uploaders will need to wait until the next run to see their Theories.

You can expect some Theories to come and go, especially if someone has deleted a tree or changed a piece of data that a Theory utilized.

I did not go back and recheck my earlier Theories because I had already ascertained the common ancestor.

I have a total of 65 matches with whom I have TOFR, one of which is a duplicate.

I have a total of 99 paths, or Theories, for those 64 matches.

Of my 64 non-duplicate matches, only 5 don’t have at least one correct Theory. Of those 5, all incorrect Theories are a result of an incorrect tree or name confusion that I was able to easily resolve. Only one needs more research.

Reviewing the match for additional surnames often reveals multiple lines of descent beyond the Theories presented.

Previously, I only had 11 matches with multiple Theories, but of my 12 new matches, only 2 don’t have multiple paths. Multiple Theories are a function of more matches, more trees, and more resources. I’m grateful for all the hints I can get.

Remember, Theories are just that – theories that point you in a research direction. They require confirmation. Good thing we’re genealogists!

Next, DNAPainter

Of course, the good news is that I could paint my new matches at DNAPainter, having assigned them to our common ancestor, thanks to Theories. DNAPainter is a great sanity check. If you have the same reasonably sized segment attributed to multiple ancestors, something is wrong, someplace.

That something could be:

  • That the segment is identical by chance in some matches
  • Someone’s genealogy is inaccurate
  • Imputation added invalid data
  • You’re related in more ways, on more lines, that you know
  • There’s an unknown parentage event in a line someplace
  • That your ancestors were related

What About You?

Do you have new Theories of Family Relativity waiting for you?

Sign on and take a look.

If you haven’t tested at or transferred your DNA to MyHeritage, you can order a test, here. Tests are currently on sale for $39.

MyHeritage offers free transfers from the DNA testing companies whose step-by-step upload instruction articles are listed below.

Instructions for uploading TO MyHeritage are found here:

If you test at MyHeritage, all DNA features, functions, and tools are free.

If you transfer your DNA file to My Heritage, DNA matching is free, but Theories of Family Relativity requires either a site data subscription to access genealogical records, which you can try for free, here, or a one time $29 unlock fee for the advanced DNA tools which include:

  • Theories of Relativity
  • Chromosome browser
  • Triangulation
  • Ethnicity estimates

Have fun!

__________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on, and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Free MyHeritage Video – Top Tips for Triangulating your DNA Matches With Roberta Estes

Yesterday’s Facebook LIVE presentation for MyHeritage was lots of fun for everyone, and now it’s available for anyone who might have missed it.

I must say, I was stunned that so many people tuned in. We had just under 5000 watching live, with just under 500 comments. There were literally people from all over the world – with perhaps the exception of the locations where it was the dead of night. A day later, there are already more than 9000 views. I hope everyone is enjoying the session.

It felt good to be connected, even if it was electronically. It was still “live.”

I saw people I knew saying “hey,” DNA matches, known cousins, longtime friends, and at least one person with a fairly rare surname from a location that I suspect shares one of my ancestors.

How cool is that?!

For people who are curious about how this works, I was too, so here’s a short explanation.

The Back Story

One day last week, MyHeritage invited me to create this seminar. I thought it would be nice – given that our lives are all disrupted right now.

They suggested half an hour to an hour, including Q&A time, but being just a tad over-zealous, mine went a little long. The entire session, plus Q&A was an hour and a quarter. It’s impossible to do triangulation justice in a short time because the presenter must first explain how and why triangulation works, and why it’s important. You can’t just dive into the middle of that pool.

Also, just to be very clear, I created this video as a volunteer – I wasn’t paid, and I’m not compensated for this or any other article either. I don’t write articles for money or in exchange for anything. If I do receive something, like a book to review that I did not purchase, I say so. My opinions are my own and not for sale.

Working as a member of a worldwide team is interesting, in part because of the time factor. Israel is 7 hours different from my time in the US, so our practice session on Sunday was quite late for their team members, Esther who you met online and Talya, working behind the scenes.

The underlying platform is a product called BeLive which records the session, provides the chat capability and interfaces with Facebook. This means that the computers, cameras and audio (headsets) of all of the people involved must all be compatible with BeLive, given that Esther and Talya are moderating and handling things like which screen is showing and moderating the chat questions. The speaker really can’t do any more than focus on their topic.

I had planned to use my laptop to present against the backdrop of my fireplace in the living room. If you’re going to have a few thousand people “over,” you might as well hostess in the nicest part of your home, right?

BeLive was challenging on my end, to put it mildly. My husband and I both spent several hours, as did Talya and Esther, trying to make things work. The camera and audio on my laptop worked just fine using other platforms, like Skype and Google Hangouts – but absolutely refused to work with BeLive. Even BeLive technical support was baffled. Nothing worked – although my husband, not to be bested by a computer, installed the desktop version of BeLive (which wasn’t supposed to be necessary), then uninstalled the plugins and reinstalled them, toggled the camera, and it magically began to work. But by that time, I had already changed courses.

Compounding the challenge, my laptop, in the midst of those efforts, just died – as in spontaneously went entirely black. No, the battery wasn’t dead, and no, I didn’t have confidence after that. I was afraid that “sudden death” would happen in the middle of the presentation. I always have to be vigilant, because Murphy lives with me and is ever-present, always lurking about.

I made the decision to shift to my desktop. It’s a newer system, but so new that it’s not entirely configured yet, I hadn’t yet used it for webinars, and I’m not completely familiar with how things work in that new environment either.

Thankfully, BeLive worked well on the desktop system and we were able to complete our practice run. It was past time for Talya and Esther to hit the hay, but I needed to clean my office, at least the part behind and beside me, where viewers could see.

So, if you’re wondering if my desk is always entirely clear, the answer would be a resounding “no.” I wasn’t about to have a messy office with company coming over😊

Actually, one of the things I liked when I watched the other MyHeritage Facebook LIVE sessions with Daniel Horowitz and Ran Snir was the homey nature. You know the presenters are recording from someplace in their house and I felt grateful to them for making that extra effort.

DNA Kits Aren’t Quarantined

You might not be able to visit grandma or your relatives, but you can still order DNA tests and have them delivered through the mail. Mother’s Day is May 10th. Order those DNA tests, here. Your gift to them and their DNA gift to you will continue solving family mysteries forever.

The Video

Now that you’ve learned more about the video production aspect than you ever wanted to know, you can watch the presentation online by clicking on the video, below. This part is super easy!

Note that it has been reported that this embedded link is not viewable in Firefox, so please use Chrome. If you do not see the video displayed below and can’t click to view, just click here.

Enjoy!!!

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

DNA Day 2020: 9 Great Ways to Celebrate an Amazing 20-Year Journey

DNA Day 2020.jpg

DNA Day 2020, celebrated officially on April 25th, is a “big deal” anniversary for genetic genealogy.

In the Beginning – Family Tree DNA 

It was 20 years ago that Family Tree DNA was born and began doing business – in collaboration with Dr. Michael Hammer whose lab ran the DNA samples at the University of Arizona.

Bennett Greenspan, a genealogist and entrepreneur teamed up with his business partner, Max Blankfeld, and launched Family Tree DNA, never no idea, of course, what their startup would one day become. That would have required a crystal ball.

Bennett just wanted to solve his own genealogy brick wall and knew that Y DNA had been used to prove, or disprove, a patrilineal genetic relationship between 2 men with the same or similar surnames.

Dr. Hammer, who was weary of calls from genealogists asking for exactly that, said to Bennett, “You know, someone should start a company doing DNA testing for genealogy.” What fateful words those turned out to be.

Family Tree DNA went from being a business run from a cellphone out of the spare bedroom to a multi-national company, now one of four subsidiary businesses under the Gene by Gene umbrella. Gene by Gene owns a 10-story building that includes a world-class genetics lab, the Genomics Research Center, in Houston, Texas.

FTDNA sign crop

Never doubt the ability of passion and persistence.

And never, ever, doubt a genealogist.

That First 12-Marker Test

In March 2000, Family Tree DNA began offering the then-revolutionary 12-marker Y DNA test, the genesis of what would progress to 25, then 37, 67, 111 and now the Big Y-700 test. The Big Y-700 offers more 700+ STR markers along with a research-grade SNP test providing testers with the very latest haplogroup information. This level of sophistication and testing wasn’t even dreamed-of 20 years ago. The human genome hadn’t even been fully sequenced, and wouldn’t be until April 2003. DNA Day is celebrated in April to commemorate that event.

That 12-marker Y DNA test was revolutionary, even though it was a but a baby-step by today’s standards. Consumer Y DNA testing had never been done before, and was the first step in a journey I could never have imagined. The butterfly effect in action.

I didn’t know I had embarked when I pushed off from that shore.😊

That journey of 10,000 miles and 20 years had to start someplace.

The Journey Begins

Twenty years ago, I heard a rumor about a company testing the Y chromosome of men for genealogy. Suspecting that it was a scam, I called Family Tree DNA and spoke with Bennett, expecting something quite different than what transpired.

I discovered a genealogist who understood my problem, explained how the technology had solved the same quandary for him, and how Y DNA testing worked for genealogy. Y DNA could help me solve my problem too, even though I didn’t have a Y chromosome. Bennett even offered to help me if I needed assistance.

An hour later, I had ordered five tests for Estes men who I knew would jump at this opportunity to prove they all descended from a common progenitor.

Along with Bennett, and other genealogists with similar quests, I now had permission to dream – and to push the limits.

I Had a Dream

I dreamed that one day I could prove even more.

Where did my Estes ancestors come from?

Did all of the Estes men in the US descend from one line? Were they from the Eastes line in Kent, England? We would discover that both of the Estes immigrant lines, indeed, did hail from the same ancestor in Deal, England.

Were those much-loved and oft-repeated rumors true?

Before arriving as fishermen on coastal England, did the Estes family actually descend from an illegitimate son of the wealthy House of Este, hailing from Padua, Italy?

The family had spent decades chasing rumors and speculating, even visiting Italy. Finally, science would answer those questions – or at least that potential existed. At long last, we had an amazing opportunity!

Bennett explained that surname projects existed in order to group men who shared a common surname, and hopefully a common ancestor too, together. I formed the Estes DNA Project and mailed those fateful DNA kits to 5 of my male Estes cousins who were genealogists and chomping at the bit to answer those questions.

I began educating myself, adding genetics to my genealogical arsenal.

In future years, I would push, or perhaps “encourage” Bennett to expand testing, harder and faster than he sometimes wanted to be pushed.

I had fallen in love with discovery.

Dr. Luigi Luca Cavalli-Sforza

While we were able to confirm that the Estes men descended from a common ancestor in England, we could not find anyone to test from the d’Este line out of Italy.

I knew that Dr. Luigi Luca Cavalli-Sforza, hailed as the father of population genetics, had done a significant amount of testing in Italy where he had begun his career, before retiring from Stanford in 1992. I had read his books – all of them.

Frustrated, I was hopeful that if I contacted Dr. Cavalli-Sforza, he might be able to compare the Estes DNA to Y DNA samples in his lab that he might have from earlier genetics studies.

If Bennett Greenspan could ask Dr. Michael Hammer at the University of Arizona, I could ask Dr. Luigi Cavalli-Sforza. Made perfect sense to me. The worst that could happen was that he might ignore me or say no. But he didn’t.

Dr. Cavalli-Sforza was very kind and engaged in discussion, explaining that no, he did not know of any males descended from the d’Este line, and no, he did not have a representative sample of Y DNA from that region of Italy. He indicated that I needed far more than he had.

We discussed what level of sampling would be required to create a survey of the Y DNA from the region to see if the Estes Y DNA was even of the type that might be found in Italy. If we were incredibly lucky, he opined, we might, just might, find a match.

In his early 80s at the time, Dr. Cavalli-Sforza was interested, engaging and sharp as a tack.

After several back-and-forth emails, we determined that I didn’t have the resources to recruit and fund the research which would have been significantly more expensive than consumer testing at Family Tree DNA. I had hoped for academic funding.

We both wondered aloud how long it would take, if ever, for there to be enough testing to reasonably compare the Estes Y DNA to other males from Italy in a meaningful way. Neither of us anticipated the DNA testing explosion that would follow.

I didn’t appreciate at the time how fortunate I was to be having these discussions with Dr. Cavalli-Sforza – an iconic giant in this field. We all stand upon his shoulders. Luigi was willing to speculate and be proven wrong, a great academic risk, because he understood that push-and-pull process was the only way to refine our knowledge and discover the truth. He will never know how much our conversations inspired and encouraged me to forge ahead into uncharted waters as well.

Dr. Cavalli-Sforza passed away in 2018 at the age of 96. He altered the trajectory of my life, and if you’re reading this, he changed yours too.

Estes Answers

The answers didn’t arrive all at once. In fact they dribbled in little by little – but they did arrive – which would never have happened if the necessary people hadn’t tested.

The Italy DNA Project didn’t exist twenty years ago. Looking at the results today, it’s evident that the majority of the results are haplogroups J and E, with a smattering of R.

My Estes cousins’ Y DNA doesn’t match anyone remotely connected with Italy, either utilizing STR markers for genealogical matches nor the Big Y-700 matches for deeper haplogroup matching.

That, combined with the fact that the wealthy illegitimate d’Este son in question “disappeared” into Europe, leaving a gap in time before our poor mariner Estes family emerged in the records in England made it extremely unlikely that there is any shred of truth in that rumor.

However, the d’Este male line does still exist in the European Royal House of Hanover, in the person of Ernst August, Prince of Hanover, Duke of Brunswick-Luneburg, husband of Princess Caroline of Monaco. Ernst is a direct descendant of Albert Azzo I d’Este, born about 970, so there’s actually hope that eventually, we will actually know what the real d’Este Y DNA looks like, assuming no biological break in the line. As of 2017, the Hanover line has not been tested.

While Ernst is in poor health today, he does have two sons to carry on the Y DNA genetic line.

9 Great Ways to Celebrate DNA Day

We have so very much to celebrate today. DNA testing for genealogy has become a juggernaut. Twenty years ago, we had to recruit people of the same surname to test or realize our wait might be forever – that’s not the case today.

Today, upwards of 30 million people have tested – and probably significantly more.

The Big Y test, born two decades ago of that 12 marker test, now scans millions of DNA locations and provides testing and matching in both the genealogical and historical timeframes, as does the mitochondrial full sequence test. In February, The Million Mito Project was launched, a science initiative to rewrite the tree of womankind.

We’ve made incredible, undreamed-of strides. We haven’t just “moved the ball,” we kicked it out of the ballpark and around the world.

Here are some fun and beneficial ways you can celebrate DNA Day!

  • If you’ve already tested, or you manage kits for others who have – check your results. You never know what might be waiting for you. Be sure to click on trees, look at locations and do the genealogy work yourself to extend trees back in time if necessary.
  • Upload your tree to DNA testing sites to help others connect to your genealogy. If we all upload trees, everyone has a better and more productive experience. If a match doesn’t have a tree, contact them, ask and explain why it’s beneficial.
  • Join relevant projects at Family Tree DNA (click myProjects on top of your dashboard page), such as surname projects, haplogroup projects, geographic projects (like Italy), and special interest projects (like American Indian.)
  • Purchase a mitochondrial DNA upgrade to the full sequence level for only $79 if you’re already tested at the HVR1 or HVR2 level. Not only does the full sequence test provide you with your full haplogroup and more refined matching, it helps advance science too through The Million Mito Project. Click here to sign in and upgrade by clicking on the shopping cart or the mtFull icon.

dna day 2020 mtdna.png

  • Test your mitochondrial DNA, your mother’s mother’s mother’s direct line for only $139 for the full sequence test. Should I tell you that this test cost $900 when I first ordered mine? $139 is an absolutely amazing price. I wrote step-by-step instructions for how to use your mitochondrial results, here. Click here to order your test.

dna day 70 off.png

Today, we have the opportunity to document history in ways never before possible.

Celebrate DNA Day by finding your ancestors!

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Fun DNA Stuff

  • Celebrate DNA – customized DNA themed t-shirts, bags and other items

Concepts: Chromosome Browser – What Is It, How Do I Use It, and Why Do I Care?

The goal of genetic genealogy is to utilize DNA matches to verify known ancestors and identify unknown ancestors.

A chromosome browser is a tool that allows testers to visualize and compare their DNA on each chromosome with that of their genetic matches. How to utilize and interpret that information becomes a little more tricky.

I’ve had requests for one article with all the information in one place about chromosome browsers:

  • What they are
  • How and when to use them
  • Why you’d want to

I’ve included a feature comparison chart and educational resource list at the end.

I would suggest just reading through this article the first time, then following along with your own DNA results after you understand the basic landscape. Using your own results is the best way to learn anything.

What Does a Chromosome Browser Look Like?

Here’s an example of a match to my DNA at FamilyTreeDNA viewed on their chromosome browser.

browser example.png

On my first 16 chromosomes, shown above, my 1C1R (first cousin once removed,) Cheryl, matches me where the chromosomes are painted blue. My chromosome is represented by the grey background, and her matching portion by the blue overlay.

Cheryl matches me on some portion of all chromosomes except 2, 6, and 13, where we don’t match at all.

You can select any one person, like Cheryl, from your match list to view on a chromosome browser to see where they match you on your chromosomes, or you can choose multiple matches, as shown below.

browser multiple example.png

I selected my 7 closest matches that are not my immediate family, meaning not my parents or children. I’m the background grey chromosome, and each person’s match is painted on top of “my chromosome” in the location where they match me. You see 7 images of my grey chromosome 1, for example, because each of the 7 people being compared to me are shown stacked below one another.

Everyplace that Cheryl matches me is shown on the top image of each chromosome, and our matching segment is shown in blue. The same for the second red copy of the chromosome, representing Don’s match to me. Each person I’ve selected to match against is shown by their own respective color.

You’ll note that in some cases, two people match me in the same location. Those are the essential hints we are looking for. We’ll be discussing how to unravel, interpret, and use matches in the rest of this article.

browser MyHeritage example.png

The chromosome browser at MyHeritage looks quite similar. However, I have a different “top 7” matches because each vendor has people who test on their platform who don’t test or transfer elsewhere.

Each vendor that supports chromosome browsers (FamilyTreeDNA, MyHeritage, 23andMe, and GedMatch) provides their own implementation, of course, but the fundamentals of chromosome browsers, how they work and what they are telling us is universal.

Why Do I Need a Chromosome Browser?

“But,” you might say, “I don’t need to compare my DNA with my matches because the vendors already tell me that I match someone, which confirms that we are related and share a common ancestor.”

Well, not exactly. It’s not quite that straightforward.

Let’s take a look at:

  • How and why people match
  • What matches do and don’t tell you
  • Both with and without a chromosome browser

In part, whether you utilize a chromosome browser or not depends on which of the following you seek:

  • A broad-brush general answer; yes or no, I match someone, but either I don’t know how are related, or have to assume why. There’s that assume word again.
  • To actually confirm and prove your ancestry, getting every ounce of value out of your DNA test.

Not everyone’s goals are the same. Fortunately, we have an entire toolbox with a wide range of tools. Different tools are better suited for different tasks.

People seeking unknown parents should read the article, Identifying Unknown Parents and Individuals Using DNA Matching because the methodology for identifying unknown parents is somewhat different than working with genealogy. This article focuses on genealogy, although the foundation genetic principles are the same.

If you’re just opening your DNA results for the first time, the article, First Steps When Your DNA Results are Ready – Sticking Your Toe in the Genealogy Water would be a great place to start.

Before we discuss chromosome browsers further, we need to talk about DNA inheritance.

Your Parents

Every person has 2 copies of each of their 22 chromosomes – one copy contributed by their mother and one copy contributed by their father. A child receives exactly half of the autosomal DNA of each parent. The DNA of each parent combines somewhat randomly so that you receive one chromosome’s worth of DNA from each of your parents, which is half of each parent’s total.

On each chromosome, you receive some portion of the DNA that each parent received from their ancestors, but not exactly half of the DNA from each individual ancestor. In other words, it’s not sliced precisely in half, but served up in chunks called segments.

Sometimes you receive an entire segment of an ancestor’s DNA, sometimes none, and sometimes a portion that isn’t equal to half of your parent’s segment.

browser inheritance.png

This means that you don’t receive exactly half of the DNA of each of your grandparents, which would be 25% each. You might receive more like 22% from one maternal grandparent and 28% from the other maternal grandparent for a total of 50% of the DNA you inherit from your parents. The other 50% of your DNA comes from the other parent, of course. I wrote about that here.

There’s one tiny confounding detail. The DNA of your Mom and Dad is scrambled in you, meaning that the lab can’t discern scientifically which side is which and can’t tell which pieces of DNA came from Mom and which from Dad. Think of a genetic blender.

Our job, using genetic genealogy, is to figure out which side of our family people who match us descend from – which leads us to our common ancestor(s).

Parallel Roads

For the purposes of this discussion, you’ll need to understand that the two copies you receive of each chromosome, one from each parent, have the exact same “addresses.” Think of these as parallel streets or roads with identical addresses on each road.

browser street.png

In the example above, you can see Dad’s blue chromosome and Mom’s red chromosome as compared to me. Of course, children and parents match on the full length of each chromosome.

I’ve divided this chromosome into 6 blocks, for purposes of illustration, plus the centromere where we generally find no addresses used for genetic genealogy.

In the 500 block, we see that the address of 510 Main (red bar) could occur on either Dad’s chromosome, or Mom’s. With only an address and nothing more, you have no way to know whether your match with someone at 510 Main is on Mom’s or Dad’s side, because both streets have exactly the same addresses.

Therefore, if two people match you, at the same address on that chromosome, like 510 Main Street, they could be:

  • Both maternal matches, meaning both descended from your mother’s ancestors, and those two people will also match each other
  • Both paternal matches, meaning both descended from your father’s ancestors, and those two people will also match each other
  • One maternal and one paternal match, and those two people will not match each other

Well then, how do we know which side of the family a match descends from, and how do we know if we share a common ancestor?

Good question!

Identical by Descent

If you and another person match on a reasonably sized DNA segment, generally about 7 cM or above, your match is probably “identical by descent,” meaning not “identical by chance.” In this case, then yes, a match does confirm that you share a common ancestor.

Identical by descent (IBD) means you inherited the piece of DNA from a common ancestor, inherited through the relevant parent.

Identical by chance (IBC) means that your mom’s and dad’s DNA just happens to have been inherited by you randomly in a way that creates a sequence of DNA that matches that other person. I wrote about both IBD and IBC here.

MMB stats by cM 2

This chart, courtesy of statistician Philip Gammon, from the article Introducing the Match-Maker-Breaker Tool for Parental Phasing shows the percentage of time we expect matches of specific segment sizes to be valid, or identical by descent.

Identical by Chance

How does this work?

How is a match NOT identical by descent, meaning that it is identical by chance and therefore not a “real” or valid match, a situation also known as a false positive?

browser inheritance grid.png

The answer involves how DNA is inherited.

You receive a chromosome with a piece of DNA at every address from both parents. Of course, this means you have two pieces of DNA at each address. Therefore people will match you on either piece of DNA. People from your Dad’s side will match you on the pieces you inherited from him, and people from your Mom’s side will match you on the pieces you inherited from her.

However, both of those matches have the same address on their parallel streets as shown in the illustration, above. Your matches from your mom’s side will have all As, and those from your dad’s side will have all Ts.

The problem is that you have no way to know which pieces you inherited from Mom and from Dad – at least not without additional information.

You can see that for 10 contiguous locations (addresses), which create an example “segment” of your DNA, you inherited all As from your Mom and all Ts from your Dad. In order to match you, someone would either need to have an A or a T in one of their two inherited locations, because you have an A and a T, both. If the other person has a C or a G, there’s no match.

Your match inherited a specific sequence from their mother and father, just like you did. As you can see, even though they do match you because they have either an A or a T in all 10 locations – the As and Ts did not all descend from either their mother or father. Their random inheritance of Ts and As just happens to match you.

If your match’s parents have tested, you won’t match either of their parents nor will they match either of your parents, which tells you immediately that this match is by chance (IBC) and not by descent (IBD), meaning this segment did not come from a common ancestor. It’s identical by chance and, therefore, a false positive.

If We Match Someone Else In Common, Doesn’t That Prove Identical by Descent?

Nope, but I sure wish it did!

The vendors show you who else you and your match both match in common, which provides a SUGGESTION as to your common ancestor – assuming you know which common ancestor any of these people share with you.

browser icw.png

However, shared matches are absolutely NOT a guarantee that you, your match, and your common matches all share the same ancestor, unless you’re close family. Your shared match could match you or your match through different ancestors – or could be identical by chance.

How can we be more confident of what matching is actually telling us?

How can we sort this out?

Uncertainties and Remedies

Here’s are 9 things you DON’T know, based on matching alone, along with tips and techniques to learn more.

  1. If your match to Person A is below about 20cM, you’ll need to verify that it’s a legitimate IBD match (not IBC). You can achieve this by determining if Person A also matches one of your parents and if you match one of Person A’s parents, if parents have tested.

Not enough parents have tested? An alternative method is by determining if you and Person A both match known descendants of the candidate ancestors ON THE SAME SEGMENT. This is where the chromosome browser enters the picture.

In other words, at least three people who are confirmed to descend from your presumptive common ancestor, preferably through at least two different children, must match on a significant portion of the same segment.

Why is that? Because every segment has its own unique genealogical history. Each segment can and often does lead to different ancestors as you move further back in time.

In this example, I’m viewing Buster, David, and E., three cousins descended from the same ancestral couple, compared to me on my chromosome browser. I’m the background grey, and they show in color. You can see that all three of them match me on at least some significant portion of the same segment of chromosome 15.

browser 3 cousins.png

If those people also match each other, that’s called triangulation. Triangulation confirms descent from a common ancestral source.

In this case, I already know that these people are related on my paternal side. The fact that they all match my father’s DNA and are therefore all automatically assigned to my paternal matching tab at Family Tree DNA confirms my paper-trail genealogy.

I wrote detailed steps for triangulation at Family Tree DNA, here. In a nutshell, matching on the same segment to people who are bucketed to the same parent is an automated method of triangulation.

Of course, not everyone has the luxury of having their parents tested, so testing other family members, finding common segments, and assigning people to their proper location in your tree facilitates confirmation of your genealogy (and automating triangulation.)

The ONLY way you can determine if people match you on the same segment, and match each other, is having segment information available to you and utilizing a chromosome browser.

browser MyHeritage triangulation.png

In the example above, the MyHeritage triangulation tool brackets matches that match you (the background grey) and who are all triangulated, meaning they all also match each other. In this case, the portion where all three people match me AND each other is bracketed. I wrote about triangulation at MyHeritage here.

  1. If you match several people who descend from the same ancestor, John Doe, for example, on paper, you CANNOT presume that your match to all of those people is due to a segment of DNA descended from John Doe or his wife. You may not match any of those people BECAUSE OF or through segments inherited from John Doe or his wife. You need segment information and a chromosome browser to view the location of those matches.

Assuming these are legitimate IBD matches, you may share another common line, known or unknown, with some or all of those matches.

It’s easy to assume that because you match and share matches in common with other people who believe they are descended from that same ancestor:

  • That you’re all matching because of that ancestor.
  • Even on the same segments.

Neither of those presumptions can be made without additional information.

Trust me, you’ll get yourself in a heap o’ trouble if you assume. Been there, done that. T-shirt was ugly.

Let’s look at how this works.

browser venn.png

Here’s a Venn diagram showing me, in the middle, surrounded by three of my matches:

  • Match 1 – Periwinkle, descends from Lazarus Estes and Elizabeth Vannoy
  • Match 2 – Teal, descends from Joseph Bolton and Margaret Claxton
  • Match 3 – Mustard, descends from John Y. Estes and Rutha Dodson

Utilizing a chromosome browser, autocluster software, and other tools, we can determine if those matches also match each other on a common segment, which means they triangulate and confirm common ancestral descent.

Of course, those people could match each other due to a different ancestor, not necessarily the one I share with them nor the ancestors I think we match through.

If they/we do all match because they descend from a common ancestor, they can still match each other on different segments that don’t match me.

I’m in the center. All three people match me, and they also match each other, shown in the overlap intersections.

Note that the intersection between the periwinkle (Match 1) and teal (Match 2) people, who match each other, is due to the wives of the children of two of my ancestors. In other words, their match to each other has absolutely nothing to do with their match to me. This was an “aha’ moment for me when I first realized this was a possibility and happens far more than I ever suspected.

The intersection of the periwinkle (Match 1) and mustard (Match 3) matches is due to the Dodson line, but on a different segment than they both share with me. If they had matched each other and me on the same segment, we would be all triangulated, but we aren’t.

The source of the teal (Match 2) to mustard (Match 3) is unknown, but then again, Match 3’s tree is relatively incomplete.

Let’s take a look at autocluster software which assists greatly with automating the process of determining who matches each other, in addition to who matches you.

  1. Clustering technology, meaning the Leeds method as automated by Genetic Affairs and DNAGedcom help, but don’t, by themselves, resolve the quandary of HOW people match you and each other.

People in a colored cluster all match you and each other – but not necessarily on the same segment, AND, they can match each other because they are related through different ancestors not related to your ancestor. The benefit of autocluster software is that this process is automated. However, not all of your matches will qualify to be placed in clusters.

browser autocluster.png

My mustard cluster above includes the three people shown in the chromosome browser examples – and 12 more matches that can be now be researched because we know that they are all part of a group of people who all match me, and several of whom match each other too.

My matches may not match each other for a variety of reasons, including:

  • They are too far removed in time/generations and didn’t inherit any common ancestral DNA.
  • This cluster is comprised of some people matching me on different (perhaps intermarried) lines.
  • Some may be IBC matches.

Darker grey boxes indicate that those people should be in both clusters, meaning the red and mustard clusters, because they match people in two clusters. That’s another hint. Because of the grid nature of clusters, one person cannot be associated with more than 2 clusters, maximum. Therefore, people like first cousins who are closely related to the tester and could potentially be in many clusters are not as useful in clusters as they are when utilizing other tools.

  1. Clusters and chromosome browsers are much less complex than pedigree charts, especially when dealing with many people. I charted out the relationships of the three example matches from the Venn diagram. You can see that this gets messy quickly, and it’s much more challenging to visualize and understand than either the chromosome browser or autoclusters.

Having said that, the ultimate GOAL is to identify how each person is related to you and place them in their proper place in your tree. This, cumulatively with your matches, is what identifies and confirms ancestors – the overarching purpose of genealogy and genetic genealogy.

Let’s take a look at this particular colorized pedigree chart.

Browser pedigree.png

click to enlarge

The pedigree chart above shows the genetic relationship between me and the three matches shown in the Venn diagram.

Four descendants of 2 ancestral couples are shown, above; Joseph Bolton and Margaret Claxton, and John Y. Estes and Rutha Dodson. DNA tells me that all 3 people match me and also match each other.

The color of the square (above) is the color of DNA that represents the DNA segment that I received and match with these particular testers. This chart is NOT illustrating how much DNA is passed in each generation – we already know that every child inherits half of the DNA of each parent. This chart shows match/inheritance coloring for ONE MATCHING SEGMENT with each match, ONLY.

Let’s look at Joseph Bolton (blue) and Margaret Claxton (pink). I descend through their daughter, Ollie Bolton, who married William George Estes, my grandfather. The DNA segment that I share with blue Match 2 (bottom left) is a segment that I inherited from Joseph Bolton (blue). I also carry inherited DNA from Margaret Claxton too, but that’s not the segment that I share with Match 2, which is why the path from Joseph Bolton to me, in this case, is blue – and why Match 2 is blue. (Just so you are aware, I know this segment descends from Joseph Bolton, because I also match descendants of Joseph’s father on this segment – but that generation/mtach is not shown on this pedigree chart.)

If I were comparing to someone else who I match through Margaret Claxton, I would color the DNA from Margaret Claxton to me pink in that illustration. You don’t have to DO this with your pedigree chart, so don’t worry. I created this example to help you understand.

The colored dots shown on the squares indicate that various ancestors and living people do indeed carry DNA from specific ancestors, even though that’s not the segment that matches a particular person. In other words, the daughter, Ollie, of Joseph Bolton and Margaret Claxton carries 50% pink DNA, represented by the pink dot on blue Ollie Bolton, married to purple William George Estes.

Ollie Bolton and William George Estes had my father, who I’ve shown as half purple (Estes) and half blue (Bolton) because I share Bolton DNA with Match 2, and Estes DNA with Match 1. Obviously, everyone receives half of each parent’s DNA, but in this case, I’m showing the path DNA descended for a specific segment shared with a particular match.

I’ve represented myself with the 5 colors of DNA that I carry from these particular ancestors shown on the pedigree chart. I assuredly will match other people with DNA that we’ve both inherited from these ancestors. I may match these same matches shown with DNA that we both inherited from other ancestors – for example, I might match Match 2 on a different segment that we both inherited from Margaret Claxton. Match 2 is my second cousin, so it’s quite likely that we do indeed share multiple segments of DNA.

Looking at Match 3, who knows very little about their genealogy, I can tell, based on other matches, that we share Dodson DNA inherited through Rutha Dodson.

I need to check every person in my cluster, and that I share DNA with on these same segment addresses to see if they match on my paternal side and if they match each other.

  1. At Family Tree DNA, I will be able to garner more information about whether or not my matches match each other by using the Matrix tool as well as by utilizing Phased Family Matching.

At Family Tree DNA, I determined that these people all match in common with me and Match 1 by using the “In Common With” tool. You can read more about how to use “In Common With” matching, here.

browser paternal.png

Family Matching phases the matches, assigning or bucketed them maternally or paternally (blue and red icons above), indicating, when possible, if these matches occur on the same side of your family. I wrote about the concept of phasing, here, and Phased Family Matching here and here.

Please note that there is no longer a limit on how distantly related a match can be in order to be utilized in Phased Family Matching, so long as it’s over the phase-matching threshold and connected correctly in your tree.

browser family tree dna link tree.png

Bottom line, if you can figure out how you’re related to someone, just add them into your tree by creating a profile card and link their DNA match to them by simply dragging and dropping, as illustrated above.

Linking your matches allows Family Matching to maternally or paternally assign other matches that match both you and your tree-linked matches.

If your matches match you on the same segment on the same parental side, that’s segment triangulation, assuming the matches are IBD. Phased Family Matching does this automatically for you, where possible, based on who you have linked in your tree.

For matches that aren’t automatically bucketed, there’s another tool, the Matrix.

browser matrix.png

In situations where your matches aren’t “bucketed” either maternally or paternally, the Matrix tool allows you to select matches to determine whether your matches also match each other. It’s another way of clustering where you can select specific people to compare. Note that because they also match each other (blue square) does NOT mean it’s on the same segment(s) where they match you. Remember our Venn diagram.

browser matrix grid.png

  1. Just because you and your matches all match each other doesn’t mean that they are matching each other because of the same ancestor. In other words, your matches may match each other due to another or unknown ancestor. In our pedigree example, you can see that the three matches match each other in various ways.
browser pedigree match.png

click to enlarge

  • Match 1 and Match 2 match each other because they are related through the green Jones family, who is not related to me.
  • Match 2 and Match 3 don’t know why they match. They both match me, but not on the same segment they share with each other.
  • Match 1 and Match 3 match through the mustard Dodson line, but not on the same segment that matches me. If we all did match on the same segment, we would be triangulated, but we wouldn’t know why Match 3 was in this triangulation group.
  1. Looking at a downloaded segment file of your matches, available at all testing vendors who support segment information and a chromosome browser, you can’t determine without additional information whether your matches also match each other.

browser chr 15.png

Here’s a group of people, above, that we’ve been working with on chromosome 15.

My entire match-list shows many more matches on that segment of chromosome 15. Below are just a few.

browser chr 15 all

Looking at seven of these people in the chromosome browser, we can see visually that they all overlap on part of a segment on chromosome 15. It’s a lot easier to see the amount of overlap using a browser as opposed to the list. But you can only view 7 at a time in the browser, so the combination of both tools is quite useful. The downloaded spreadsheet shows you who to select to view for any particular segment.

browser chr 15 compare.png

The critical thing to remember is that some matches will be from tyour mother’s side and some from your father’s side.

Without additional information and advanced tools, there’s no way to tell the difference – unless they are bucketed using Phased Family Matching at Family Tree DNA or bracketed with a triangulation bracket at MyHeritage.

At MyHeritage, this assumes you know the shared ancestor of at least one person in the triangulation group which effectively assigns the match to the maternal or paternal side.

Looking at known relatives on either side, and seeing who they also match, is how to determine whether these people match paternally or maternally. In this example below, the blue people are bucketed paternally through Phased Family Matching, the pink maternally, and the white rows aren’t bucketed and therefore require additional evaluation.

browser chr 15 maternal paternal.png

Additional research shows that Jonathan is a maternal match, but Robert and Adam are identical by chance because they don’t match either of my parents on this segment. They might be valid matches on other segments, but not this one.

browser chr 15 compare maternal paternal.png

  1. Utilizing relatives who have tested is a huge benefit, and why we suggest that everyone test their closest upstream relatives (meaning not children or grandchildren.) Testing all siblings is recommended if both parents aren’t available to test, because every child received different parts of their parents’ DNA, so they will match different relatives.

After deleting segments under 7 cM, I combine the segment match download files of multiple family members (who agree to allow me to aggregate their matches into one file for analysis) so that I can create a master match file for a particular family group. Sorting by match name, I can identify people that several of my cousins’ match.

browser 4 groups.png

This example is from a spreadsheet where I’ve combined the results of about 10 collaborating cousins to determine if we can break through a collective brick wall. Sorted by match name, this table shows the first 4 common matches that appear on multiple cousin’s match lists. Remember that how these people match may have nothing to do with our brick wall – or it might.

Note that while the 4 matches, AB, AG, ag, and A. Wayne, appear in different cousins’ match lists, only one shares a common segment of DNA: AB triangulates with Buster and Iona. This is precisely WHY you need segment information, and a chromosome browser, to visualize these matches, and to confirm that they do share a common DNA segment descended from a specific ancestor.

These same people will probably appear in autocluster groups together as well. It’s worth noting, as illustrated in the download example, that it’s much more typical for “in common with” matches to match on different segments than on the same segment. 

  1. Keep in mind that you will match both your mother and father on every single chromosome for the entire length of each chromosome.

browser parent matching.png

Here’s my kit matching with my father, in blue, and mother, in red on chromosomes 1 and 2.

Given that I match both of my parents on the full chromosome, inheriting one copy of my chromosome from each parent, it’s impossible to tell by adding any person at random to the chromosome browser whether they match me maternally or paternally. Furthermore, many people aren’t fortunate enough to have parents available for testing.

To overcome that obstacle, you can compare to known or close relatives. In fact, your close relatives are genetic genealogy gold and serve as your match anchor. A match that matches you and your close relatives can be assigned either maternally or paternally. I wrote about that here.

browser parent plus buster.png

You can see that my cousin Buster matches me on chromosome 15, as do both of my parents, of course. At this point, I can’t tell from this information alone whether Buster matches on my mother’s or father’s side.

I can tell you that indeed, Buster does match my father on this same segment, but what if I don’t have the benefit of my father’s DNA test?

Genealogy tells me that Buster matches me on my paternal side, through Lazarus Estes and Elizabeth Vannoy. Given that Buster is a relatively close family member, I already know how Buster and I are related and that our DNA matches. That knowledge will help me identify and place other relatives in my tree who match us both on the same segment of DNA.

To trigger Phased Family Matching, I placed Buster in the proper place in my tree at Family Tree DNA and linked his DNA. His Y DNA also matches the Estes males, so no adoptions or misattributed parental events have occurred in the direct Estes patrilineal line.

browser family tree dna tree.png

I can confirm this relationship by checking to see if Buster matches known relatives on my father’s side of the family, including my father using the “in common with” tool.

Buster matches my father as well as several other known family members on that side of the family on the same segments of DNA.

browser paternal bucket.png

Note that I have a total of 397 matches in common with Buster, 140 of which have been paternally bucketed, 4 of which are both (my children and grandchildren), and 7 of which are maternal.

Those maternal matches represent an issue. It’s possible that those people are either identical by chance or that we share both a maternal and paternal ancestor. All 7 are relatively low matches, with longest blocks from 9 to 14 cM.

Clearly, with a total of 397 shared matches with Buster, not everyone that I match in common with Buster is assigned to a bucket. In fact, 246 are not. I will need to take a look at this group of people and evaluate them individually, their genealogy, clusters, the matrix, and through the chromosome browser to confirm individual matching segments.

There is no single perfect tool.

Every Segment Tells a Unique History

I need to check each of the 14 segments that I match with Buster because each segment has its own inheritance path and may well track back to different ancestors.

browser buster segments.png

It’s also possible that we have unknown common ancestors due to either adoptions, NPEs, or incorrect genealogy, not in the direct Estes patrilineal line, but someplace in our trees.

browser buster paint.png

The best way to investigate the history and genesis of each segment is by painting matching segments at DNAPainter. My matching segments with Buster are shown painted at DNAPainter, above. I wrote about DNAPainter, here.

browser overlap.png

By expanding each segment to show overlapping segments with other matches that I’ve painted and viewing who we match, we can visually see which ancestors that segment descends from and through.

browser dnapainter walk back.png

These roughly 30 individuals all descend from either Lazarus Estes and Elizabeth Vannoy (grey), Elizabeth’s parents (dark blue), or her grandparents (burgundy) on chromosome 15.

As more people match me (and Buster) on this segment, on my father’s side, perhaps we’ll push this segment back further in time to more distant ancestors. Eventually, we may well be able to break through our end-of-line brick wall using these same segments by looking for common upstream ancestors in our matches’ trees.

Arsenal of Tools

This combined arsenal of tools is incredibly exciting, but they all depend on having segment information available and understanding how to use and interpret segment and chromosome browser match information.

One of mine and Buster’s common segments tracks back to end-of-line James Moore, born about 1720, probably in Virginia, and another to Charles Hickerson born about 1724. It’s rewarding and exciting to be able to confirm these DNA segments to specific ancestors. These discoveries may lead to breaking through those brick walls eventually as more people match who share common ancestors with each other that aren’t in my tree.

This is exactly why we need and utilize segment information in a chromosome browser.

We can infer common ancestors from matches, but we can’t confirm segment descent without specific segment information and a chromosome browser. The best we can do, otherwise, is to presume that a preponderance of evidence and numerous matches equates to confirmation. True or not, we can’t push further back in time without knowing who else matches us on those same segments, and the identity of their common ancestors.

The more evidence we can amass for each ancestor and ancestral couple, the better, including:

  • Matches
  • Shared “In Common With” Matches, available at all vendors.
  • Phased Family Matching at Family Tree DNA assigns matches to maternal or paternal sides based on shared, linked DNA from known relatives.
  • The Matrix, a Family Tree DNA tool to determine if matches also match each other. Tester can select who to compare.
  • ThruLines from Ancestry is based on a DNA match and shared ancestors in trees, but no specific segment information or chromosome browser. I wrote about ThruLines here and here.
  • Theories of Family Relativity, aka TOFR, at MyHeritage, based on shared DNA matches, shared ancestors in trees and trees constructed between matches from various genealogical records and sources. MyHeritage includes a chromosome browser and triangulation tool. I wrote about TOFR here and here.
  • Triangulation available through Phased Family Matching at Family Tree DNA and the integrated triangulation tool at MyHeritage. Triangulation between only 3 people at a time is available at 23andMe, although 23andMe does not support trees. See triangulation article links in the Resource Articles section below.
  • AutoClusters at MyHeritage (cluster functionality included), at Genetic Affairs (autoclusters plus tree reconstruction) and at DNAGedcom (including triangulation).
  • Genealogical information. Please upload your trees to every vendor site.
  • Y DNA and mitochondrial DNA confirmation, when available, through Family Tree DNA. I wrote about the 4 Kinds of DNA for Genetic Genealogy, here and the importance of Y DNA confirmation here, and how not having that information can trip you up.
  • Compiled segment information at DNAPainter allows you to combine segment information from various vendors, paint your maternal and paternal chromosomes, and visually walk segments back in time. Article with DNAPainter instructions is found here.

Autosomal Tool Summary Table

In order to help you determine which tool you need to use, and when, I’ve compiled a summary table of the types of tools and when they are most advantageous. Of course, you’ll need to read and understand about each tool in the sections above. This table serves as a reminder checklist to be sure you’ve actually utilized each relevant tool where and how it’s appropriate.

Family Tree DNA MyHeritage Ancestry 23andMe GedMatch
DNA Matches Yes Yes Yes Yes, but only highest 2000 minus whoever does not opt -in Yes, limited matches for free, more with subscription (Tier 1)
Download DNA Segment Match Spreadsheet Yes Yes No, must use DNAGedcom for any download, and no chromosome segment information Yes Tier 1 required, can only download 1000 through visualization options
Segment Spreadsheet Benefits View all matches and sort by segment, target all people who match on specific segments for chromosome browser View all matches and sort by segment, target all people who match on specific segments for chromosome browser No segment information but matches might transfer elsewhere where segment information is available View up to 2000 matches if matches have opted in. If you have initiated contact with a match, they will not drop off match list. Can download highest 1000 matches, target people who match on specific segments
Spreadsheet Challenges Includes small segments, I delete less than 7cM segments before using No X chromosome included No spreadsheet and no segment information Maximum of 2000 matches, minus those not opted in Download limited to 1000 with Tier 1, download not available without subscription
Chromosome Segment Information Yes Yes No, only total and longest segment, no segment address Yes Yes
Chromosome Browser Yes, requires $19 unlock if transfer Yes, requires $29 unlock or subscription if transfer No Yes Yes, some features require Tier 1 subscription
X Chromosome Included Yes No No Yes Yes, separate
Chromosome Browser Benefit Visual view of 7 or fewer matches Visual view of 7 or fewer matches, triangulation included if ALL people match on same portion of common segment No browser Visual view of 5 or fewer matches Unlimited view of matches, multiple options through comparison tools
Chromosome Browser Challenges Can’t tell whether maternal or paternal matches without additional info if don’t select bucketed matches Can’t tell whether maternal or paternal without additional info if don’t triangulate or you don’t know your common ancestor with at least one person in triangulation group No browser Can’t tell whether maternal or paternal without other information Can’t tell whether maternal or paternal without other information
Shared “In Common With” Matches Yes Yes Yes Yes, if everyone opts in Yes
Triangulation Yes, Phased Family Matching, plus chromosome browser Yes, included in chromosome browser if all people being compared match on that segment No, and no browser Yes, but only for 3 people if “Shared DNA” = Yes on Relatives in Common Yes, through multiple comparison tools
Ability to Know if Matches Match Each Other (also see autoclusters) Yes, through Matrix tool or if match on common bucketed segment through Family Matching Yes, through triangulation tool if all match on common segment No Yes, can compare any person to any other person on your match list Yes, through comparison tool selections
Autoclusters Can select up to 10 people for Matrix grid, also available for entire match list through Genetic Affairs and DNAGedcom which work well Genetic Affairs clustering included free, DNAGedcom has difficulty due to timeouts No, but Genetic Affairs and DNAGedcom work well No, but Genetic Affairs and DNAGedcom work well Yes, Genetic Affairs included in Tier 1 for selected kits, DNAGedcom is in beta
Trees Can upload or create tree. Linking you and relatives who match to tree triggers Phased Family Matching Can upload or create tree. Link yourself and kits you manage assists Theories of Family Relativity Can upload or create tree. Link your DNA to your tree to generate ThruLines. Recent new feature allows linking of DNA matches to tree. No tree support but can provide a link to a tree elsewhere Upload your tree so your matches can view
Matching and Automated Tree Construction of DNA Matches who Share Common Ancestors with You Genetic Affairs for matches with common ancestors with you Not available Genetic Affairs for matches with common ancestors with you No tree support Not available
Matching and Automated Tree Construction for DNA Matches with Common Ancestors with Each Other, But Not With You Genetic Affairs for matches with common ancestors with each other, but not with you Not available Genetic Affairs for matches with common ancestors with each other, but not with you No tree support Not available
DNAPainter Segment Compilation and Painting Yes, bucketed Family Match file can be uploaded which benefits tester immensely. Will be able to paint ethnicity segments soon. Yes No segment info available, encourage your matches to upload elsewhere Yes, and can paint ethnicity segments from 23andMe, Yes, but only for individually copied matches or highest 1000.
Y DNA and Mitochondrial Matching Yes, both, includes multiple tools, deep testing and detailed matching No No No, base haplogroup only, no matching No, haplogroup only if field manually completed by tester when uploading autosomal DNA file

Transfer Your DNA

Transferring your DNA results to each vendor who supports segment information and accepts transfers is not only important, it’s also a great way to extend your testing collar. Every vendor has strengths along with people who are found there and in no other database.

Ancestry does not provide segment information nor a chromosome browser, nor accept uploads, but you have several options to transfer your DNA file for free to other vendors who offer tools.

23andMe does provide a chromosome browser but does not accept uploads. You can download your DNA file and transfer free to other vendors.

I wrote detailed upload/download and transfer instructions for each vendor, here.

Two vendors and one third party support transfers into their systems. The transfers include matching. Basic tools are free, but all vendors charge a minimal fee for unlocking advanced tools, which is significantly less expensive than retesting:

Third-party tools that work with your DNA results include:

All vendors provide different tools and have unique strengths. Be sure that your DNA is working as hard as possible for you by fishing in every pond and utilizing third party tools to their highest potential.

Resource Articles

Explanations and step by step explanations of what you will see and what to do, when you open your DNA results for the first time.

Original article about chromosomes having 2 sides and how they affect genetic genealogy.

This article explains what triangulation is for autosomal DNA.

Why some matches may not be valid, and how to tell the difference.

This article explains the difference between a match group, meaning a group of people who match you, and triangulation, where that group also matches each other. The concepts are sound, but this article relies heavily on spreadsheets, before autocluster tools were available.

Parental phasing means assigning segment matches to either your paternal or maternal side.

Updated, introductory article about triangulation, providing the foundation for a series of articles about how to utilize triangulation at each vendor (FamilyTreeDNA, MyHeritage, 23andMe, GEDmatch, DNAPainter) that supports triangulation.

These articles step you through triangulation at each vendor.

DNAPainter facilitates painting maternally and paternally phased, bucketed matches from FamilyTreeDNA, a method of triangulation.

Compiled articles with instructions and ideas for using DNAPainter.

Autoclustering tool instructions.

How and why The Leeds Method works.

Step by step instructions for when and how to use FamilyTreeDNA’s chromosome browser.

Close family members are the key to verifying matches and identifying common ancestors.

This article details how much DNA specific relationships between people can expect to share.

Overview of transfer information and links to instruction articles for each vendor, below.

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Fun DNA Stuff

  • Celebrate DNA – customized DNA themed t-shirts, bags, and other items

Shared cM Project 2020 Analysis, Comparison & Handy Reference Charts

Recently, Blaine Bettinger published V4 of the Shared cM Project, and along with that, Jonny Perl at DNAPainter updated the associated interactive tool as well, including histograms. I wrote about that, here.

The goal of the shared cM project was and remains to document how much DNA can be expected to be shared by various individuals at specific relationship levels. This information allows matches to at least minimally “position” themselves in a general location their trees or conversely, to eliminate specific potential relationships.

Shared cM Project match data is gathered by testers submitting their match information through the submission portal, here.

When the Shared cM Project V3 was released in September 2017, I combined information from various sources and provided an analysis of that data, including the changes from the V2 release in 2016.

I’ve done the same thing this year, adding the new data to the previous release’s table.

Compiled Comparison Table

I initially compiled this table for myself, then decided to update it and share with my readers. This chart allows me to view various perspectives on shared data and relationships and in essence has all the data I might need, including multiple versions, in one place. Feel free to copy and save the table.

In the comparison table below, the relationship rows with data from various sources is shown as follows:

  • White – Shared cM Project 2016
  • Peach – Shared cM Project 2017
  • Purple – Shared cM Project 2020
  • Green – DNA Detectives chart

I don’t know if DNA Detectives still uses the “green chart” or if they have moved to the interactive DNAPainter tool. I’ve retained the numbers for historical reference regardless.

Additionally, in some places, you’ll see references to the “degree of relationship,” as in “third degree relatives always match each other.” I’ve included a “Degree of Relationship” column to the far right, but I don’t come across those “relationship degree” references often anymore either. However, it’s here for reference if you need it.

23andMe still gives relationships in percentages, so I’ve included the expected shared percent of DNA for each relationship and the actual shared range from the DNA Detectives Green Chart.

One column shows the expected shared cM amount, assuming that 50% of the DNA from each ancestor is passed on in each generation. Clearly, we know that inheritance doesn’t happen that cleanly because recombination is a random event and children do NOT inherit exactly half of each ancestor’s DNA carried by their parents, but the average should be someplace close to this number.

shared cm table 2020

click to open separately, then use your magnifier to enlarge

The first thing I noticed about V4 is that there is a LOT more data which means that the results are likely more accurate. V4 increased by 32K data points, or 147%. Bravo to everyone who participated, to Blaine for the analysis and to Jonny for automating the results at DNAPainter.

Methods

Blaine provided his white paper, here, which includes “everything you need to know” about the project, and I strongly encourage you to read it. Not only does this document explain the process and methods, it’s educational in its own right.

On the first page, Blaine discusses issues. Any time you are crowd sourcing information, you’re going to encounter challenges and errors. Blaine did remove any entries that were clearly problematic, plus an additional 1% of all entries for each category – .5% from each end meaning the largest and smallest entries. This was done in an attempt to remove the results most likely to be erroneous.

Known issues include:

  • Data entry errors – I refer to these as “clerical mutations,” but they happen and there is no way, unless the error is egregious, to know what is a typo and what is real. Obviously, a parent sharing only a 10 cM segment with a child is not possible, but other data entry errors are well within the realm of possible.
  • Incorrect relationships – Misreported or misunderstood relationships will skew the numbers. Relationships may be believed to be one type, but are actually something else. For example, a half vs full sibling, or a half vs full aunt or uncle.
  • Misunderstood Relationships – People sometimes become confused as to the difference between “half” and “removed” from time to time. I wrote a helpful article titled Quick Tip – Calculating Cousin Relationships Easily.
  • Endogamy – Endogamy occurs when a population intermarries within itself, meaning that the same ancestral DNA is present in many members of the community. This genetic result is that you may share more DNA with those cousins than you would otherwise share with cousins at the same distance without endogamy.
  • Pedigree Collapse – Pedigree collapse occurs when you find the same ancestors multiple times in your tree. The closer to current those ancestors appear, the more DNA you will potentially carry from those repeat ancestors. The difference between endogamy and pedigree collapse is that endogamy is a community event and pedigree collapse has only to do with your own tree. You might just have both, too.
  • Company Reporting Differences – Different companies report DNA in different ways in addition to having different matching thresholds. For example, Family Tree DNA includes in your match total all DNA to 1 cM that you share with a match over the matching threshold. Conversely, Ancestry has a lower matching threshold, but often strips out some matching DNA using Timber. 23andMe counts fully identical segments twice and reports the X chromosome in their totals. MyHeritage does not report the X chromosome. There is no “right” or “wrong,” or standardization, simply different approaches. Hopefully, the variances will be removed or smoothed in the averages.
  • Distant Cousin Relationships – While this isn’t really an issue, per se, it’s important to understand what is being reported beyond 2nd cousin relationships in that the only relationships used to calculate these averages is the DNA from people who DO share DNA with their more distant cousins. In other words, if you do NOT match your 3rd cousin, then your “0” shared DNA is not included in the average. Only those who do match have their matching amounts included. This means that the average is only the average of people who match, not the average of all 3rd cousins.

Challenges aside, the Shared cM Project provides genealogists with a wonderful opportunity to use the combined data of tens of thousands of relationships to estimate and better understand the relationship range of our matches.

The Shared cM Project in combination with DNAPainter provides us with a wonderful tool.

Histograms

When analyzing the data, one of the first things I noticed was a very unusual entry for parent/child relationships.

We all know that children each inherit exactly half of their parent’s DNA. We expect to find an amount in the ballpark of 3400, give or take a bit for normal variances like read errors or reporting differences.

Shared cM parent child.png

click to enlarge

I did not expect to see a minimum shared cM amount for a child/parent relationship at 2376, fully 1024 cM below expected value of 3400 cM. Put bluntly, that’s simply not possible. You cannot live without one third of one of your parent’s DNA. If this data is actually accurate from someone’s account, please contact me because I want to actually see this phenomenon.

I reached out to Blaine, knowing this result is not actually possible, wondering how this would ever get through the quality control cycle at any vendor.

After some discussion, here’s Blaine’s reply:

If you look at the histogram, you’ll see that those are most likely outliers. One of my lessons for the ScP (Shared cM Project) lately is that people shouldn’t be using the data without the histograms.

People get frustrated with this, but I can’t edit data without a basis even if I think it doesn’t make sense. I have to let the data itself decide what data to remove. So I removed 1% from each relationship, the lowest 0.5% and the highest 0.5%. I could have removed more, but based on the histograms, [removing] more appeared to be removing too much valid data. As people submit more parent/child relationships these outliers/incorrect submissions will be removed. But thankfully using the histograms makes it clear.

Indeed, if you look on page 23 on Blaine’s white paper, you’ll see the following histogram of parent/child relationships submitted.

shared cm histogram.png

click to enlarge

Keep in mind that Blaine already removed any obvious errors, plus 1% of the total from either end of the spectrum. In this case, he utilized 2412 submissions, so he would have removed about 24 entries that were even further out on the data spectrum.

On the chart above, we can see that a total of about 14 are still really questionable. It’s not until we get to 3300 that these entries seem feasible. My speculation is that these people meant to type 3400 instead of 2400, and so forth.

shared cm parent grid.png

click to enlarge

The great news is that Jonny Perl at DNAPainter included the histograms so you can judge for yourself if you are in the weeds on the outlier scale by clicking on the relationship.

shared cm parent submissions.png

click to enlarge

Other relationships, like this niece/nephew relationship fit the expected bell shaped curve very nicely.

shared cm niece.png

Of course, this means that if you match your niece or nephew at 900 cM instead of the range shown above, that person is probably not your full niece or nephew – a revelation that may be difficult because of the implications for you, your parent and sibling. This would suggest that your sibling is a half sibling, not a full sibling.

Entering specific amounts of shared DNA and outputting probabilities of specific relationships is where the power of DNAPainter enters the picture. Let’s enter 900 cM and see what happens.

shared cm half niece.png

That 900 cM match is likely your half niece or nephew. Of course, this example illustrates perfectly why some relationships are entered incorrectly – especially if you don’t know that your niece or nephew is a half niece or nephew – because your sibling is a half-sibling instead of a full sibling. Some people, even after receiving results don’t realize there is a discrepancy, either because their data is on the boundary, with various relationships being possible, or because they don’t understand or internalize the genetic message.

shared cm full siblings.png

click to enlarge

This phenomenon probably explains the low minimum value for full siblings, because many of those full siblings aren’t. Let’s enter 1613 and see what DNAPainter says.

shared cm half sibling.png

You’ll notice that DNAPainter shows the 1613 cM relationship as a half-sibling.

shared cm sibling.png

And the histogram indeed shows that 1613 would be the outlier. Being larger that 1600, it would appear in the 1700 category.

shared cm half vs full.png

click to enlarge

Accurately discerning close relationships is often incredibly important to testers. In the histogram chart above, you can see that the blue and orange histograms plotted on the same chart show that there is only a very small amount of overlap between the two histograms. This suggests that some people, those in the overlap range, who believe they are full siblings are in reality half-siblings, and possibly, a few in the reverse situation as well.

What Else is Noteworthy?

First, some relationships cannot be differentiated or sorted out by using the cM data or histogram charts alone.

shared cm half vs aunt.png

click to enlarge

For example, you cannot tell the difference between half-siblings and an aunt/uncle relationship. In order to make that determination, you would need to either test or compare to additional people or use other clues such as genealogical research or geographic proximity.

Second, the ranges of many relationships are wider than they were before. Often, we see the lows being lower and the highs being higher as a result of more data.

shared cm low high.png

click to enlarge

For example, take a look at grandparents. The expected relationship is 1700 cM, the average is 1754 which is very close to the previous average numbers of 1765 and 1766. However, the minimum is now 984 and the new maximum is 2462.

Why might this be? Are ranges actually wider?

Blaine removed 1% each time, which means that in V3, 6 results would have been removed, 3 from each end, while 11 would be removed in V4. More data means that we are likely to see more outliers as entries increase, with the relationship ranges are increasingly likely to overlap on the minimum and maximum ends.

Third, it’s worth noting that several relationships share an expected amount of DNA that is equal, 12.5% which equals 850 cM, in this example.

shared cm 4 relationships.png

click to enlarge

These four relationships appear to be exactly the same, genetically. The only way to tell which one of these relationships is accurate for a given match pair, aside from age (sometimes) and opportunity, is to look at another known relationship. For example, how closely might the tester be related to a parent, sibling, aunt, uncle or first cousin, or one of their other matches. Occasionally, an X chromosome match will be enlightening as well, given the unique inheritance path of the X chromosome.

Additional known relationships help narrow unknown relationships, as might Y DNA or mitochondrial DNA testing, if appropriate. You can read about who can test for the various kinds of tests, here.

Fourth, it’s been believed for several years that all 5th degree relatives, and above, match, and the V4 data confirms that.

shared cm 5th degree.png

click to enlarge

There are no zeroes in the column for minimum DNA shared, 4th column from right.

5th degree relatives include:

  • 2nd cousins
  • 1st cousins twice removed
  • Half first cousins once removed
  • Half great-aunt/uncle

Fifth, some of your more distant cousins won’t match you, beginning with 6th degree relationships.

shared cm disagree.png

click to enlarge

At the 6th degree level, the following relationships may share no DNA above the vendor matching threshold:

  • First cousins three times removed
  • Half first cousins twice removed
  • Half second cousins
  • Second cousins once removed

You’ll notice that the various reporting models and versions don’t always agree, with earlier versions of the Shared cM Project showing zeroes in the minimum amount of DNA shared.

Sixth, at the 7th degree level, some number of people in every relationship class don’t share DNA, as indicated by the zeros in the Shared cM Minimum column.

shared cm 7th degree.png

click to enlarge

The more generations back in time that you move, the fewer cousins can be expected to match.

shared cm isogg cousin match.png

This chart from the ISOGG Wiki Cousin statistics page shows the probability of matching a cousin at a specific level based on information provided by testing companies.

Quick Reference Chart Summary

In summary, V4 of the Shared cM Project confirms that all 2nd cousins can expect to match, but beyond that in your trees, cousins may or may not match. I suspect, without evidence, that the further back in time that people are related, the less likely that the proper “cousinship level” is reported. For example, it would be easier to confuse 7th and 8th cousins as compared to 1st and 2nd cousins. Some people also confuse 8th cousins with 8 generations back in your tree. It’s not equivalent.

shared cm eighth cousin.png

click to enlarge

It’s interesting to note that Degree 17 relatives, 8th cousins, 9 generations removed from each other (counting your parents as generation 1), still match in some cases. Note that some companies and people count you as generation 1, while others count your parents as generation 1.

The estimates of autosomal matching reaching 5 or 6 generations back in time, meaning descendants of common 4 times great-grandparents will sometimes match, is accurate as far as it goes, although 5-6 generations is certainly not a line in the sand.

It would be more accurate to state that:

  • 2nd cousins, people descended from common great-grandparents, 3 generations back in time will always match
  • 4th cousins, people descended from common 3 times great grandparents, 5 generations back in time, will match about half of the time
  • 8th cousins, people descended from 7 times great grandparents, 9 generations back in time still match a small percentage of the time
  • Cousins from more distant ancestors can possibly match, but it’s unlikely and may result from a more recent unknown ancestor

I created this summary chart, combining information from the ISOGG chart and the Shared cM Project as a handy quick reference. Enjoy!

shared cm quick reference.png

click to enlarge

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Fun DNA Stuff

  • Celebrate DNA – customized DNA themed t-shirts, bags and other items

Pandemic Journal: “Rosie the Mask Crafter” & Conquering Fear

As we look back, from our privileged position today in a safe home doing genealogy, we think that participating in a historic event or time might have been fun. Exhilarating or exciting, perhaps, or both.

When you’re in that historical moment where life changes in the blink of an eye, as we are today, and you don’t know who will see the other side, or what the other side looks like, it’s not fun or exciting in a good way. It’s flat out terrifying.

Our Ancestors Did It

We are doing today what our ancestors did before us. We are persevering and putting one foot in front of the other, doing what we can with what we have in the circumstances in which we find ourselves. They were resourceful, and so are we.

Bravery is not the absence of fear, it’s working through the fear, in spite of fear and doing something productive. Sometimes that “something” becomes our legacy.

It’s Your Turn

As one of the army of mask-makers isolated in her home says, “It’s up to me to be the history maker. Our lives are a culmination of the choices we make and the chances we take.”

That woman, still anonymous, is now and will be forevermore known simply as “Rosie, the Mask Crafter.”

Pandemic Rosie.png

An entire army of sewists, many of them quilters, are sewing masks, every day, all day, coordinating requests, delivering supplies and completed masks where they are needed across the country. The dozens made in our homes added together combine into rivers of hundreds that become thousands and then tens of thousands, but the need never abates.

Still, we cut and sew and pick up and deliver, day and night, and we will until either the virus is defeated, or the manufacturing industry can ramp up enough to meet the demand.

Thousands of us are members of social media coordination efforts that sprang up overnight to answer the call. Not only can we save others by staying home, we can help to protect our brave front line fighters in this war to the death – our health care providers who never signed up to fight battles. Yet, there they are every single day, trying to save us and themselves in a war zone that has been transformed from something that seemed perfectly normal just a couple weeks ago to a Hell scene straight from the apocalypse.

Someone posted “Rosie the Mask Crafter’s” picture, iconically posing by her sewing machine, a pandemic version of Rosie the Riveter who represents an entire generation of women who stepped up in 1943 during WWII to fill the manufacturing void.

Pandemic Rosie Riveter

Thank you to “Rosie” for permission to use her photo.

Then, a couple days later, this…from group member, professional artist, Camilla Webster:

Thank you to the member who shared a photo of “Rosie, The Mask Crafter.”

I painted her today for all of you in memory of my friend Maria who passed away this weekend of COVID-19.

Keep up the great work!

I salute all of you! ❤️✨🙌

Pandemic Rosie painting

Rosie, The Mask Crafter, Copyright @ Camilla Webster Inc 2020 ❤️ – Thank you to Camilla for permission to use her painting.

I have to tell you, when you know someone who is sick or dies from this monster, this gets real – real fast. When your friend’s spouse is a doctor or nurse ON the Covid floor, doesn’t have enough PPE and they ask you for help protecting their loved one – it gets real, very real in a heartbeat. Just like it did for Camilla when her friend died.

Suddenly, you’re not sewing, you’re driving your tank through the night to create the defenses our medical warriors need so the masks can be overnighted the next morning. They are the front lines, but we have their backs as much as possible. If they can do that, we can certainly do this from the safety of our seclusion – a luxury they aren’t afforded.

And on and on we sew – as the streams of sirens scream, delivering the flood of critically ill people to hospitals across our nation as city after city becomes overwhelmed.

You May Need Masks for Your Family – You Can Do This!!

If you are willing to make masks for front line medical workers or others in need, such as nurses aids, public servants or other essential workers, there are numerous groups on social media coordinating by state and county. Search for terms like “mask” or “face mask warriors.” Call your local quilt shops, hospitals, police department, sheriff or EMS facilities to see if they are aware of local need in places like nursing homes or medical offices.

I’ve provided the pattern I use here, along with pictures of how I’m making the masks.

As the pandemic worsens, it appears that the CDC may recommend wearing face masks when we go out in public, not only to prevent picking up the virus, but from spreading it if we are infected but not symptomatic. Even if you’re not sewing for donation, you may want to make some for your own family. Men are sewing just same as women – everyone can do this, even if you’ve never sewn before.

The frightening thing is, we are nowhere near the peak yet. So, I want to share something else with you today.

It’s OK to Be Afraid

It’s alright to be afraid.

I posted a link to the article, The Discomfort You’re Feeling Is Grief on my Facebook page. I’ve tried very hard to stay positive, but that’s not always possible, especially since I have family on that front line.

I feel like this isn’t just a temporary situation, but a fundamental change – a paradigm shift in life as we know it. Not only do we not know who will be on the other side, we don’t know what “the other side” looks like.

After I posted the link, I discovered that two of my cousins expressed their feelings. One said she is angry, and one said she is afraid. We discussed this, together, and a few more people chimed in. It felt good to share what we are all feeling and admit that we can’t be cheerful and upbeat all of the time. It was comforting to know we are not alone and that yes, we are grieving.

This situation exacerbates other life events that are already saddening – like deaths of family and pets when we can’t travel, and funerals that can’t happen at all. It isolates us when we most need to be together and hug our family – but we can’t. We risk their very lives, and others, if we don’t continue to isolate. This is particularly difficult when dealing with the critically ill, knowing we may not see them again and we’re missing our last opportunity, or when dealing with elderly or other people who can’t understand WHY we’re not there.

We don’t always, always have to put on the smiling face, the mask of our own that says, “it’s going to be alright,” because truthfully, we don’t know whether it will be or not. Yet, we all say that to each other as reassurance, a form of whistling while walking past the cemetery in the dark.

But here’s the thing. I don’t know if I’ll survive this, or if all of my family will – but I have a choice today. I’m inconvenienced and afraid, but I’m also able to fight and I promise you, I will fight until my dying breath whether it’s sooner or later. By making masks, by still doing for others as I can, by teaching and writing these articles, by honoring my ancestors and by fighting for those who desperately need help, both human and animal – I will fight on.

I may be frightened, but I’m not down and I’m not out – and I’m trying to make sure others aren’t either. I’m absolutely determined, committed and steadfast in my perseverance – even if we are all whistling while walking in the dark. Keep on walking, one step at a time! We are walking together – virtually – if not in person.

Five Things

If you’re not sewing masks, and even those of us who are can’t do that 24X7, here are 5 things you can do that will distract you and lift your spirits.

  1. The VGA (Virtual Genealogy Association) Entertainment Show free video is here, minus the music which had to be removed because it might have been a copyright violation to play or sing those songs.
  2. Legacy Family Tree Webinars is having a free genealogy webinar every single day in the month of April, here or you can subscribe for free unlimited access to everything, here.
  3. MyHeritage is making the photo colorization tool free, here, and all US census records are free here or you can try a free trial subscription to all the records, here. DNA tests are also on sale for $39, here.
  4. If you’ve DNA tested at any of the companies and contacted people in the past who haven’t answered, now’s a great time to check for new matches (don’t forget Y and mitochondrial DNA) and reach out because many people are safely tucked away at home. What better time to do some genealogy and reach out to others?
  5. Here’s a list of free educational videos and more than half a million National Archives records that you can use if you’re schooling your children at home, or maybe you’re interested yourself. Wait, you could assign genealogy research as homework! YES! Now THAT, that is a silver lining!

Stay “Rosie Strong.” You got this!

Pandemic Rosie strong.jpg

_____________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Products and Services

Genealogy Research

Fun DNA Stuff

  • Celebrate DNA – customized DNA themed t-shirts, bags and other items

Triangulation in Action at DNAPainter

Recently, I published the article, Hitting a Genealogy Home Run Using Your Double-Sided Two-Faced Chromosomes While Avoiding Imposters. The “Home Run” article explains why you want to use a chromosome browser, what you’re seeing and what it means to you.

This article, and the rest in the “Triangulation in Action” series introduces triangulation at FamilyTreeDNA, MyHeritage, 23andMe, GedMatch and DNAPainter, explaining how to use triangulation to confirm descent from a common ancestor. You may want to read the introductory article first.

This first section, “What is Triangulation” is a generic tutorial. If you don’t need the tutorial, skip to the “Transfers” or “Triangulation at DNAPainter” section.

What is Triangulation?

Think of triangulation as a three-legged stool – a triangle. Triangulation requires three things:

  1. At least three (not closely related) people must match
  2. On the same reasonably sized segment of DNA and
  3. Descend from a common ancestor

Triangulation is the foundation of confirming descent from a common ancestor, and thereby assigning a specific segment to that ancestor. Without triangulation, you might just have a match to someone else by chance. You can confirm mathematical triangulation, numbers 1 and 2, above, without knowing the identity of the common ancestor.

Reasonably sized segments are generally considered to be 7cM or above on chromosomes 1-22 and 15cM or above for the X chromosome.

Boundaries

Triangulation means that all three, or more, people much match on a common segment. However, what you’re likely to see is that some people don’t match on the entire segment, meaning more or less than others as demonstrated in the following examples.

FTDNA Triangulation boundaries

You can see that I match 5 different cousins who I know descend from my father’s side on chromosome 15 above. “I” am the grey background against which everyone else is being compared.

I triangulate with these matches in different ways, forming multiple triangulation groups that I’ve discussed individually, below.

Triangulation Group 1

FTDNA triangulation 1

Group 1 – On the left group of matches, above, I triangulate with the blue, red and orange person on the amount of DNA that is common between all of them, shown in the black box. This is triangulation group 1.

Triangulation Group 2

FTDNA triangulation 2

Group 2 – However, if you look just at the blue and orange triangulated matches bracketed in green, I triangulate on slightly more. This group excludes the red person because their beginning point is not the same, or even close. This is triangulation group 2.

Triangulation Group 3 and 4

FTDNA triang 3

Group 3 – In the right group of matches, there are two large triangulation groups. Triangulation group 3 includes the common portions of blue, red, teal and orange matches.

Group 4 – Triangulation group 4 is the skinny group at right and includes the common portion of the blue, teal and dark blue matches.

Triangulation Groups 5 and 6

FTDNA triang 5

Group 5 – There are also two more triangulation groups. The larger green bracketed group includes only the blue and teal people because their end locations are to the right of the end locations of the red and orange matches. This is triangulation group 5.

Group 6 – The smaller green bracketed group includes only the blue and teal person because their start locations are before the dark blue person. This is triangulation group 6.

There’s actually one more triangulation group. Can you see it?

Triangulation Group 7

FTDNA triang 7

Group 7 – The tan group includes the red, teal and orange matches but only the areas where they all overlap. This excludes the top blue match because their start location is different. Triangulation group 7 only extends to the end of the red and orange matches, because those are the same locations, while the teal match extends further to the right. That extension is excluded, of course.

Slight Variations

Matches with only slight start and end differences are probably descended from the same ancestor, but we can’t say that for sure (at this point) so we only include actual mathematically matching segments in a triangulation group.

You can see that triangulation groups often overlap because group members share more or less DNA with each other. Normally we don’t bother to number the groups – we just look at the alignment. I numbered them for illustration purposes.

Shared or In-Common-With Matching

Triangulation is not the same thing as a 3-way shared “in-common-with” match. You may share DNA with those two people, but on entirely different segments from entirely different ancestors. If those other two people match each other, it can be on a segment where you don’t match either of them, and thanks to an ancestor that they share who isn’t in your line at all. Shared matches are a great hint, especially in addition to other information, but shared matches don’t necessarily mean triangulation although it’s a great place to start looking.

I have shared matches where I match one person on my maternal side, one on my paternal side, and they match each other through a completely different ancestor on an entirely different segment. However, we don’t triangulate because we don’t all match each other on the SAME segment of DNA. Yes, it can be confusing.

Just remember, each of your segments, and matches, has its own individual history.

Imputation Can Affect Matching

Over the years the chips on which our DNA is processed at the vendors have changed. Each new generation of chips tests a different number of markers, and sometimes different markers – with the overlaps between the entire suite of chips being less than optimal.

I can verify that most vendors use imputation to level the playing field, and even though two vendors have never verified that fact, I’m relatively certain that they all do. That’s the only way they could match to their own prior “only somewhat compatible” chip versions.

The net-net of this is that you may see some differences in matching segments at different vendors, even when you’re comparing the same people. Imputation generally “fills in the blanks,” but doesn’t create large swatches of non-existent DNA. I wrote about the concept of imputation here.

What I’d like for you to take away from this discussion is to be focused on the big picture – if and how people triangulate which is the function important to genealogy. Not if the start and end segments are exactly the same.

Triangulation Solutions

All vendors except Ancestry offer some type of triangulation.

If you and your Ancestry matches have uploaded to GedMatch, Family Tree DNA or MyHeritage, you can triangulate with them there. Otherwise, you can’t triangulate Ancestry results, so encourage your Ancestry matches to transfer.

I wrote more specifically about triangulation here and here.

Transfer your results in order to obtain the maximum number of matches possible. Every vendor has people in their data base that haven’t tested elsewhere.

Transfers

Have you tested family members, especially everyone in the older generations? You can transfer their kits from Ancestry or 23andMe if they’ve tested there to FamilyTreeDNA, MyHeritage and GedMatch.

Here’s how to transfer:

Now that we’ve reviewed triangulation at each vendor; FamilyTreeDNA, MyHeritage, 23andMe and GedMatch, let’s looking at utilizing triangulation at DNAPainter.

Triangulation at DNAPainter

Once you identify your ancestral segments with matches, or using triangulation, you can paint them on your maternal or paternal chromosomes utilizing DNAPainter.

The great aspect of DNAPainter is that you don’t have to triangulate in order to use DNAPainter. Just identifying matches as maternal or paternal allows you to visually see where on your maternal or paternal chromosomes your matches fall, in essence triangulating groups for you.

DNAPainter assigns colors to each ancestor and shows your match names, which I’ve disabled in this example for privacy. I’ve also optionally painted my ethnicity segments from 23andMe, which I discussed in this article.

Triangulation DNAPainter chr 22.png

Above, on chromosome 22, I’ve painted matches that I know descend from either my mother’s (pink) or father’s (blue) side. At DNAPainter, I DO have both a maternal and paternal chromosome, but they are only useful AFTER I figure out which side of my family a match comes from, or if I paint my Family Matching bucketed maternal and paternal matches in an upload file from Family Tree DNA. I wrote instructions for how to do that, here. The combination of Family Matching and DNAPainter is awesome!

Looking at the graphic above, I know that three separate people who match me descend from the bright pink ancestor on my maternal chromosome; Curtis Lore and his wife. I’ve assigned Curtis the bright pink color, and now every match that I paint assigned to Curtis and his wife is colored pink.

One person descends from Curtis’s parents, Anthony Lore and his wife Rachel Hill who I’ve assigned as green.

Until someone else matches me and descends either from Anthony Lore’s parents or Rachel Hill’s parents on this green segment, I won’t know which of those two ancestors, or both, provided (pieces of) that segment to me.

Anthony Lore and Rachel Hill are my great-great-grandparents and Curtis Lore is their son. Even if I only have 2 matches on this segment, one pink and one green, I would know that the green portion of my maternal chromosome 22 is attributed to Anthony and Rachel which means I inherited that green segment from my pink ancestor, Curtis Lore.

In order to determine the source of the two pink triangulated matches at far right, I’ll need to wait until someone from either Curtis’s line or his wife Nora Kirsch’s line match me on that same segment.

We build these groups of triangulated segments slowly, creating in essence a timeline on our chromosomes. It seems like it’s taking forever, but four generations distance with 2 separate triangulated segments really isn’t bad at all!

At DNAPainter, triangulation is as simple as painting your identified matches, either individually, one by one, or using the group import features. I would only recommend utilizing that feature at Family Tree DNA where their Family Matching software divides your matches into maternal and paternal, allowing DNAPainter to paint them on the correct chromosome. Otherwise, the segments are painted, but you can’t tell which side, maternal or paternal, they come from, so I don’t find painting all matches useful without some way to differentiate between maternal and paternal. After all, the point and power of a chromosome browser is to determine how each person is related, from which side, and from which ancestor.

In the article, DNAPainter Instructions and Resources, I compiled my various articles about the many ways to use DNAPainter, including an introduction.

Transfer

Be sure to test at or transfer to each vendor who provides segment information. Unfortunately, Ancestry does not, but you can transfer your ancestry results to Family Tree DNA, MyHeritage and GedMatch, each of which has unique features that the others don’t have. Transferring and matching is free at each vendor.

I wrote transfer instructions for each vendor, here.

Then, paint and triangulate all in one step at DNAPainter.

Have fun!

______________________________________________________________

Disclosure

I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.

Thank you so much.

DNA Purchases and Free Transfers

Genealogy Services

Genealogy Research