Tag Archives: MyHeritage

Ancestry’s ThruLines Are a Hot Mess Right Now – But Here Are Some Great Alternatives

Posted on by
37

Right now, ThruLines at Ancestry is one hot mess.

Aside from the inherent frustration, especially over a holiday weekend when many people had planned to work on their genealogy, I’d like to say, “don’t panic.”

I don’t have any inside information about what’s going on at Ancestry, and I’ve attempted to make contact through their support page with no luck. They make talking to a person exceedingly difficult; plus, it’s a holiday weekend, and they are probably inundated.

Regardless, I have an idea of what is happening. Ancestry has been in the midst of recalculating “things,” perhaps in relation to their other changes, which I’ll write about separately in a few days.

In any event, Ancestry SURELY MUST KNOW there’s a significant problem because I imagine thousands of their customers are screaming right about now. Adding another voice won’t be helpful.

Symptoms

  • You may not have ThruLines at all.
  • If you do have ThruLines, don’t trust the information, or more to the point, don’t trust that it’s in any way complete.

I have two tests at Ancestry, both connected to different trees so that my matches and Thrulines are calculated separately for each test.

Test One

My first Ancestry test is connected to my primary tree. I’ve been amassing Thrulines cousins ever since the feature was released. I have hundreds of cousin matches descended from some of my more prolific ancestors.

Additionally, my sister’s grandchildren have tested, as have other close relatives who have connected their tests to their trees.

Today, those people are still showing on my match list, but are NOT showing as matches in ThruLines. None of them. Most of my ThruLines ancestors are showing zero matches, and the rest are only showing very few. Ancestors who had hundreds before now have 2, for example.

Here’s an example with my cousin, Erik.

My grandfather, William George Estes, shown in Erik’s tree, above, is his great-grandfather. Erik is my half first cousin, once removed, and we share 417 cM over 16 segments.

Yet, looking at my ThruLine for William George Estes, neither he nor my other cousins are shown as matches. Same for William George’s parents, and so forth.

ThruLines is VERY ill right now.

Test Two

My second DNA test at Ancestry is even worse. There are no ThruLines calculated, even though my DNA is tree-attached, and I had ThruLines previously.

I see this message now, and I can’t even begin to tell you how irritating this is – in part because it suggests the problem is my fault. It’s clearly not. My tree hasn’t changed one bit. I’m not alone, either. I’ve seen other people posting this same message.

And yes, if you’re thinking that there is absolutely no excuse for this – you’re right.

However, outrage isn’t good for us and won’t help – so let’s all do something else fun and productive instead.

Productive Genealogy Plans

Here are some productive suggestions.

At MyHeritage:

At FamilyTreeDNA:

  • Build your haplogroup pedigree chart by locating people through different companies descended from each ancestor in your tree through the appropriate line of descent, and see if they have or will take a Y-DNA or mtDNA test.
  • Tests are on sale right now, and there’s no subscription required at FamilyTreeDNA for anything.
  • Check Y-DNA and mtDNA tests to see if there are new matches and if you share a common ancestor.

At 23andMe:

  • Check for new matches and triangulation.
  • Check to see if 23andMe has added any of your new matches to your genetic tree.

Remember, the parental sides are typically accurate, but the exact placement may not be, and 23andMe deals poorly with half-relationships. It’s certainly still worth checking though, because 23andMe does a lot of heavy lifting for you.

DNAPainter

For me, the most productive thing to do this weekend would be to copy the segment information from new matches with whom I can identify common ancestors at FamilyTreeDNA, MyHeritage and 23andMe – the vendors who provide segment data – and paint those segments to DNAPainter.

Not only does DNAPainter allow me to consolidate my match data in one place, DNAPainter provides the ability for me to confirm ancestors through triangulation, and to assign unknown matches to ancestors as well.

As you can see, I’ve successfully assigned about 90% of my segments to an ancestor, meaning I’ve confirmed descent from that ancestor based on my autosomal matches’ descent from that same ancestor – preferably through another child. Will new matches propel me to 91%? I hope so.

What percentage can you or have you been able to assign?

If you need help getting started, or ideas, I’ve written about DNAPainter several times and provided a compiled resource library of those articles, here.

Have fun!!!

_____________________________________________________________

Follow DNAexplain on Facebook, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

Which DNA Test Should I Buy? And Why?

Posted on by
13

Which DNA test should I buy, and why?

I receive questions like this often. As a reminder, I don’t take private clients anymore, which means I don’t provide this type of individual consulting or advice. However, I’m doing the next best thing! In this article, I’m sharing the step-by-step process that I utilize to evaluate these questions so you can use the process too.

It’s important to know what questions to ask and how to evaluate each situation to arrive at the best answer for each person.

Here’s the question I received from someone I’ll call John. I’ve modified the wording slightly and changed the names for privacy.

I’m a male, and my mother was born in Charleston, SC. My maternal grandmother’s maiden name was Jones and a paternal surname was Davis. The family was supposed to have been Black, Dutch, Pennsylvania Dutch, and Scots-Irish…only once was I told I was 3/16 Indian, with Davis being 3/4 and Jones being full Indian.

Do I have enough reasonable information to buy a test, and which one?

Please note that it’s common for questions to arrive without all the information you need to provide a sound answer – so it’s up to you to ask those questions and obtain clarification.

Multiple Questions

There are actually multiple questions here, so let me parse this a bit.

  1. John never mentioned what his testing goal was.
  2. He also never exactly said how the paternal line of Davis was connected, so I’ve made an assumption. For educational purposes, it doesn’t matter because we’re going to walk through the evaluation process, which is the same regardless.
  3. John did not include a tree or a link to a tree, so I created a rudimentary tree to sort through this. I need the visuals and normally just sketch it out on paper quickly.
  4. Does John have enough information to purchase a test?
  5. If so, which test?

There is no “one size fits all” answer, so let’s discuss these one by one.

Easy Answers First

The answer to #4 is easy.

Anyone with any amount of information can purchase a DNA test. Adoptees do it all the time, and they have no prior information.

So, yes, John can purchase a test.

The more difficult question is which test, because that answer depends on John’s goals and whether he’s just looking for some quick information or really wants to delve into genealogy and learn. Neither approach is wrong.

Many people think they want a quick answer –  and then quickly figure out that they really want to know much more about their ancestors.

I wrote an article titled DNA Results – First Glances at Ethnicity and Matching for new testers, here.

Goals

Based on what John said, I’m going to presume his goals are probably:

  • To prove or disprove the family oral history of Black, Dutch, Pennsylvania Dutch (which is actually German,) Scots-Irish, and potentially Native American.
  • John didn’t mention actual genealogy, which would include DNA matches and trees, so we will count that as something John is interested in secondarily. However, he may need genealogy records to reach his primary goal.

If you’re thinking, “The process of answering this seemingly easy question is more complex than I thought,” you’d be right.

Ethnicity in General

It sounds like John is interested in ethnicity testing. Lots of people think that “the answer” will be found there – and sometimes they are right. Often not so much. It depends.

The great news is that John really doesn’t need any information at all to take an autosomal DNA test, and it doesn’t matter if the test-taker is male or female.

To calculate each tester’s ethnicity, every testing company compiles their own reference populations, and John will receive different results at each of the major companies. Each company updates their ethnicity results from time to time as well, and they will change.

Additionally, each company provides different tools for their customers.

The ethnicity results at different companies generally won’t match each other exactly, and sometimes the populations look quite different.

Normally, DNA from a specific ancestor can be found for at least 5 or 6 generations. Of course, that means their DNA, along with the DNA from all of your other ancestors is essentially combined in a communal genetic “pot” of your chromosomes, and the DNA testing company needs to sort it out and analyze your DNA for ethnicity.

DNA descended from ancestors, and their populations, further back in people’s trees may not be discerned at all using autosomal DNA tests.

A much more specific “ethnicity” can be obtained for both the Y-DNA line, which is a direct patrilineal line for men (blue arrow,) and the mitochondrial DNA line (pink arrows,) which is a direct matrilineal line for everyone, using those specific tests.

We will discuss both of those tests after we talk about the autosomal tests available from the four major genealogy DNA testing companies. All of these tools can and should be used together.

Let’s Start with Native American

Let’s evaluate the information that John provided.

John was told that he “was 3/16 Indian, with Davis being 3/4 and Jones being full Indian.”

We need to evaluate this part of his question slightly differently.

I discussed this in the article, Ancestral DNA Percentages – How Much of Them is in You?

First, we need to convert generations to 16ths.

You have two ancestors in your parent’s generation, four in your grandparents, and so forth. You have 16 great-great-grandparents. So, if John was 3/16th Native, then three of his great-great-grandparents would have been fully Native, or an equivalent percentage. In other words, six ancestors in that generation could have been half-Native. Based on what John said, they would have come from his mother’s side of the tree. John is fortunate to have that much information to work with.

He told us enough about his tree that we can evaluate the statement that he might be 3/16ths Native.

Here’s the tree I quickly assembled in a spreadsheet based on John’s information.

His father, at left, is not part of the equation based on the information John provided.

On his mother’s side, John said that Grandfather Davis is supposed to be three-quarters Native, which translates to 12/16ths. Please note that it would be extremely beneficial to find a Y-DNA tester from his Davis line, like one of his mother’s brothers, for example.

John said that his Grandmother Jones is supposed to be 100% Native, so 16/16ths.

Added together, those sum to 28/32, which reduces down to 14/16th or 7/8th for John’s mother.

John would have received half of his autosomal DNA from his mother and half from his non-Native father. That means that if John’s father is 100% non-Native, John would be half of 14/16ths or 7/16ths, so just shy of half Native.

Of course, we know that we don’t always receive exactly 50% of each of our ancestors’ DNA (except for our parents,) but we would expect to see something in the ballpark of 40-45% Native for John if his grandmother was 100% Native and his grandfather was 75%.

Using simple logic here, for John’s grandmother to be 100% Native, she would almost assuredly have been a registered tribal member, and the same if his grandfather was 75% Native. I would think that information would be readily available and well-known to the family – so I doubt that this percentage is accurate. It would be easy to check, though, on various census records during their lifetimes where they would likely have been recorded as “Indian.” They might have been in the special “Indian Census” taken and might be living on a reservation.

It should also be relatively easy to find their parents since all family members were listed every ten years in the US beginning with the 1850 census.

The simple answer is that if John’s grandparents had as much Native as reported, he would be more than 3/16th – so both of these factoids cannot simultaneously be accurate. But that does NOT mean neither is accurate.

John could be 7/8th or 40ish%, 3/16th or 18ish%, or some other percentage. Sometimes, where there is smoke, there is fire. And that seems to be the quandary John is seeking to resolve.

Would  Ethnicity/Population Tests Show This Much Native?

Any of the four major testing companies would show Native for someone whose percentage would be in the 40% or 18% ballpark.

The easiest ethnicities to tell apart from one another are continental-level populations. John also stated that he thinks he may also have Black ancestry, plus Dutch, Pennsylvania Dutch (German), and Scots-Irish. It’s certainly possible to verify that using genealogy, but what can DNA testing alone tell us?

How far back can we expect to find ethnicities descending from particular ancestors?

In this table, you can see at each generation how many ancestors you have in that generation, plus the percentage of DNA, on average, you would inherit from each ancestor.

All of the major DNA testing companies can potentially pick up small trace percentages, but they don’t always. Sometimes one company does, and another doesn’t. So, if John has one sixth-generation Native American ancestor, he would carry about 1.56% Native DNA, if any.

  • Sometimes a specific ethnicity is not found because, thanks to random recombination, you didn’t inherit any of that DNA from those ancestors. This is why testing your parents, grandparents, aunts, uncles, and siblings can be very important. They share your same ancestors and may have inherited DNA that you didn’t that’s very relevant to your search.
  • Sometimes it’s not found because the reference populations and algorithms at that testing company aren’t able to detect that population or identify it accurately, especially at trace levels. Every DNA testing company establishes their own reference populations and writes internal, proprietary ethnicity analysis algorithms.
  • Sometimes it’s not found because your ancestor wasn’t Native or from that specific population.
  • Sometimes it’s there, but your population is called something you don’t expect.

For example, you may find Scandinavian when your ancestor was from England or Ireland. The Vikings raided the British Isles, so while some small amount of Scandinavian is not what you expect, that doesn’t mean it‘s wrong. However, if all of your family is from England, it’s not reasonable to have entirely Scandinavian ethnicity results.

It’s also less likely as each generation passes by that the information about their origins gets handed down accurately to following generations. Most non-genealogists don’t know the names of their great-grandparents, let alone where their ancestors were from.

Using a 25-year average generation length, by the 4th generation, shown in the chart above, you have 16 ancestors who lived approximately 100 years before your parents were born, so someplace in the mid-1800s. It’s unlikely for oral history from that time to survive intact. It’s even less likely from a century years earlier, where in the 7th generation, you have 128 total ancestors.

The best way to validate the accuracy of your ethnicity estimates is by researching your genealogy. Of course, you need to take an ethnicity test, or two, in order to have results to validate.

Ethnicity has a lot more to offer than just percentages.

Best Autosomal Tests for Native Ethnicity

Based on my experience with people who have confirmed Native ancestry, the two best tests to detect Native American ethnicity, especially in smaller percentages, are both FamilyTreeDNA and 23andMe.

Click images to enlarge

In addition to percentages, both 23andMe and FamilyTreeDNA provide chromosome painting for ethnicity, along with segment information in download files. In other words, they literally paint your ethnicity results on your chromosomes.

They then provide you with a file with the “addresses” of those ethnicities on your chromosomes, which means you can figure out which ancestors contributed those ethnicity segments.

The person in the example above, a tester at FamilyTreeDNA, is highly admixed with ancestors from European regions, African regions and Native people from South America.

Trace amounts of Native American with a majority of European heritage would appear more like this.

You can use this information to paint your chromosome segments at DNAPainter, along with your matching segments to other testers where you can identify your common ancestors. This is why providing trees is critically important – DNA plus ancestor identification with our matches is how we confirm our ancestry.

This combination allows you to identify which Native (or another ethnicity) segments descended from which ancestors. I was able to determine which ancestor provided that pink Native American segment on chromosome 1 on my mother’s side.

I’ve provided instructions for painting ethnicity segments to identify their origins in specific ancestors, here.

Autosomal and Genealogy

You may have noticed that we’ve now drifted into the genealogy realm of autosomal DNA testing. Ethnicity is nice, but if you want to know who those segments came from, you’ll need:

  • Autosomal test matching to other people
  • To identify your common ancestor with as many matches as you can
  • To match at a company who provides you with segment information for each match
  • To work with DNAPainter, which is very easy

The great news is that you can do all of that using the autosomal tests you took for ethnicity, except at Ancestry who does not provide segment information.

Best Autosomal Test for Matching Other Testers

The best autosomal test for matching may be different for everyone. Let’s look at some of the differentiators and considerations.

If you’re basing a testing recommendation solely on database size, which will probably correlate to more matches, then the DNA testing vendors fall into this order:

If you’re basing that recommendation on the BEST, generally meaning the closest matches for you, there’s no way of knowing ahead of time. At each of the four DNA testing companies, I have very good matches who have not tested elsewhere. If I weren’t in all four databases, I would have missed many valuable matches.

If you’re basing that recommendation on which vendor began testing earliest, meaning they have many tests from people who are now deceased, so you won’t find their autosomal tests in other databases that don’t accept uploads, the recommended testing company order would be:

If you’re basing that recommendation on matches to people who live in other countries, the order would be:

Ancestry and 23andMe are very distant third/fourth because they did not sell widely outside the US initially and still don’t sell in as many countries as the others, meaning their testers’ geography is more limited. However, Ancestry is also prevalent in the UK.

If you’re basing that recommendation on segment information and advanced tools that allow you to triangulate and confirm your genetic link to specific ancestors, the order would be:

Ancestry does NOT provide any segment information.

If you’re basing that recommendation on unique tools provided by each vendor, every vendor has something very beneficial that the others don’t.

In other words, there’s really no clear-cut answer for which single autosomal DNA test to order. The real answer is to be sure you’re fishing in all the ponds. The fish are not the same. Unique people test at each of those companies daily who will never be found in the other databases.

Test at or upload your DNA to all four DNA testing companies, plus GEDmatch. Step-by-step instructions for downloading your raw data file and uploading it to the DNA testing companies who accept uploads can be found, here.

Test or Upload

Not all testing companies accept uploads of raw autosomal DNA data files from other companies. The good news is that some do, and it’s free to upload and receive matches.

Two major DNA testing companies DO NOT accept uploads from other companies. In other words, you have to test at that company:

Two testing companies DO accept uploads from the other three companies. Uploads and matching are free, and advanced features can be unlocked very cost effectively.

  • FamilyTreeDNA – free matching and $19 unlock for advanced features
  • MyHeritage – free matching and $29 unlock.for advanced features

I recommend testing at both 23andMe and Ancestry and uploading one of those files to both FamilyTreeDNA and MyHeritage, then purchasing the respective unlocks.

GEDmatch

GEDmatch is a third-party matching site, not a DNA testing company. Consider uploading to GEDmatch because you may find matches from Ancestry who have uploaded to GEDmatch, giving you access to matching segment information.

Other Types of DNA

John provided additional information that may prove to be VERY useful. Both Y-DNA and mitochondrial DNA can be tested as well and may prove to be more useful than autosomal to positively identify the origins of those two specific lines.

Let’s assume that John takes an autosomal test and discovers that indeed, the 3/16th Native estimate was close. 3/16th equates to about 18% Native which would mean that three of his 16 great-great-grandparents were Native.

John told us that his Grandmother Jones was supposed to be 100% Native.

At the great-great-grandparent level, John has 16 ancestors, so eight on his mother’s side, four from maternal grandmother Jones and four from his maternal grandfather Davis.

John carries the mitochondrial DNA of his mother (red boxes and arrows,) and her mother, through a direct line of females back in time. John also carries the Y-DNA of his father (dark blue box, at left above, and blue arrows below.)

Unlike autosomal DNA which is admixed in every generation, mitochondrial DNA (red arrows) is inherited from that direct matrilineal line ONLY and never combines with the DNA of the father. Mothers give their mitochondrial DNA to both sexes of their children, but men never contribute their mitochondrial DNA to offspring. Everyone has their mother’s mitochondrial DNA.

Because it never recombines with DNA from the father, so is never “watered down,” we can “see” much further back in time, even though we can’t yet identify those ancestors.

However, more importantly, in this situation, John can test his own mitochondrial DNA that he inherited from his mother, who inherited it from her mother, to view her direct matrilineal line.

John’s mitochondrial DNA haplogroup that will be assigned during testing tells us unquestionably whether or not his direct matrilineal ancestor was Native on her mother’s line, or not. If not, it may well tell us where that specific line originated.

You can view the countries around the world where Y-DNA haplogroups are found, here, and mitochondrial haplogroups, here.

If John’s mitochondrial DNA haplogroup is Native, that confirms that one specific line is Native. If he can find other testers in his various lines to test either their Y-DNA or mitochondrial DNA, John can determine if other ancestors were Native too. If not, those tests will reveal the origins of that line, separate from the rest of his genealogical lines.

Although John didn’t mention his father’s line, if he takes a Y-DNA test, especially at the Big Y-700 level, that will also reveal the origins of his direct paternal line. Y-DNA doesn’t combine with the other parent’s DNA either, so it reaches far back in time too.

Y-DNA and mitochondrial DNA tests are laser-focused on one line each, and only one line. You don’t have to try to sort it out of the ethnicity “pot,” wondering which ancestor was or was not Native.

My Recommendation

When putting together a testing strategy, I recommend taking advantage of free uploads and inexpensive unlocks when possible.

  • To confirm Native American ancestry via ethnicity testing, I recommend testing at 23andMe and uploading to FamilyTreeDNA, then purchasing the $19 unlock. The free upload and $19 unlock are less expensive than testing there directly.
  • For matching, I recommend testing at Ancestry and uploading to MyHeritage, then unlocking the MyHeritage advanced features for $29, which is less expensive than retesting. Ancestry does not provide segment information, but MyHeritage (and the others) do.

At this point, John will have taken two DNA tests, but is now in all four databases, plus GEDmatch if he uploads there.

  • For genealogy research on John’s lines to determine whether or not his mother’s lines were Native, I recommend an Ancestry and a MyHeritage records subscription, plus using WikiTree, which is free.
  • To determine if John’s mother’s direct matrilineal female line was Native, I recommend that John order the mitochondrial DNA test at FamilyTreeDNA.
  • When ordering multiple tests, or uploading at FamilyTreeDNA, be sure to upload/order all of one person’s tests on the same DNA kit so that those results can be used in combination with each other.

Both males and females can take autosomal and mitochondrial DNA tests.

  • To discover what he doesn’t know about his direct paternal, meaning John’s surname line – I recommend the Big Y-700 test at FamilyTreeDNA.

Only males can take a Y-DNA test, so women would need to ask their father, brother, or paternal uncle, for example, to test their direct paternal line.

  • If John can find a male Davis from his mother’s line, I recommend that he purchase the Big Y-700 test at FamilyTreeDNA for that person, or check to see if someone from his Davis line may have already tested by viewing the Davis DNA Project. Like with mitochondrial DNA, the Y-DNA haplogroup will tell John the origins of his direct Davis male ancestor – plus matching of course. He will be able to determine if they were Native, and if not, discover the origins of the Davis line.
  • For assigning segments to ancestors and triangulating to confirm descent from a common ancestor, I recommend 23andMe, MyHeritage, FamilyTreeDNA and GEDmatch, paired with DNAPainter as a tool.

Shopping and Research List

Here are the tests and links recommended above:

More Than He Asked

I realize this answer is way more than John expected or even knew to ask. That’s because there is often no “one” or “one best” answer. There are many ways to approach the question after the goal is defined, and the first “answer” received may be a bit out of context.

For example, let’s say John has 2% Native ancestry and took a test at a vendor who didn’t detect it. John would believe he had none. But a different vendor might find that 2%. If it’s on his mother’s direct matrilineal line, mitochondrial DNA testing will confirm, or refute Native, beyond any doubt, regardless of autosomal ethnicity results – but only for that specific ancestral line.

Autosomal DNA can suggest Native across all your DNA, but Y-DNA and mitochondrial DNA confirm it for each individual ancestor.

Even when autosomal testing does NOT show Native American, or African, for example, it’s certainly possible that it’s just too far back in time or has not been passed down during random recombination, but either Y-DNA or mitochondrial DNA will unquestionably confirm (or refute) the ancestry in question if the right person is tested.

This is exactly why I attempt to find a cousin who descends appropriately from every ancestor and provide testing scholarships. It’s important to obtain Y-DNA and mitochondrial DNA information for each ancestor.

Which Test Should I Order?

What steps will help you decide which test or tests to take?

  1. Define your testing goal.
  2. Determine if your Y-DNA or mitochondrial DNA will help answer the question.
  3. Determine if you need to find ancestors another generation or two back in time to get the most benefit from DNA testing. In our example, if John discovered that both of his grandparents were enrolled tribal members, that’s huge, and the tribe might have additional information about his family.
  4. Subscribe to Ancestry and MyHeritage records collections as appropriate to perform genealogical research. Additional information not only provides context for your family, it also provides you with the ability to confirm or better understand your ethnicity results.
  5. Extend your tree so that you can obtain the best results from the three vendors who support trees; Ancestry, FamilyTreeDNA, and MyHeritage. All three use trees combined with DNA tests to provide you with additional information.
  6. Order 23andMe and Ancestry autosomal DNA tests.
  7. Either test at or upload one of those tests to MyHeritage, FamilyTreeDNA, and GEDmatch.
  8. If a male, order the Big Y-700 DNA test. Or, find a male from your ancestral line who has taken or will take that test. I always offer a testing scholarship and, of course, share the exciting results!
  9. Order a mitochondrial DNA test for yourself and for appropriately descended family members to represent other ancestors. Remember that your father (and his siblings) all carry your paternal grandmother’s mitochondrial DNA. That’s often a good place to start after testing your own DNA.
  10. If your parents or grandparents are alive, or aunts and uncles, test their autosomal DNA too. They are (at least) one generation closer to your ancestors than you are and will carry more of your ancestors’ DNA.
  11. Your siblings will carry some of your ancestors’ DNA that you do not, so test them too if both of your parents aren’t available for testing.

Enjoy!!!

_____________________________________________________________

Follow DNAexplain on Facebook, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

Did You Receive New Theories of Family Relativity at MyHeritage?

Posted on by
9

MyHeritage updates Theories of Family Relativity periodically, and this is your lucky week. MyHeritage updated Theories and new Theories about shared ancestors with your matches may be waiting for you!

I received an email that I had new Theories, and when I signed on and clicked on DNA, I was greeted by this banner.

I always make notes when I review Theories, so it’s easy for me to tell which Theories I haven’t yet reviewed. They don’t have notes. The notes icon turns purple when you enter and save something.

I received six new Theories this week.

Click to enlarge

I love that MyHeritage shows you exactly how they make these potential connections. I have five different paths to consider for this Theory, and MyHeritage shows me the confidence level that these are the same people. I can click on the other person’s tree or historical documents if that’s what MyHeritage used, in addition to trees.

Theories are there to help you make genealogical connections, so take full advantage of this tool. Did you receive new Theories?

If your DNA isn’t yet at MyHeritage, now’s a great time to either order a DNA test or upload your DNA file from a different vendor for free, plus create or upload a tree, so you’ll be ready for the next update.

Resources

I’ve written about Theories of Family Relativity, how to get them, and how to use them, in the following articles.

Enjoy!

___________________________________________________________

Follow DNAexplain on Facebook, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

Comparing DNA Results – Different Tests at the Same Testing Company

Posted on by
28

Several people have asked about different tests at the same DNA testing company. They wondered if matching is affected, meaning whether your matches are different if you have two different tests at the same company. Specifically, they asked if you are better off purchasing a test AT a DNA testing vendor that allows uploads, rather than uploading a test from a different vendor. Does it make a difference to the tester or their matches? Do they have the same matches?

These are great questions, and the answer isn’t conclusive. It varies based on several factors.

Having multiple tests at the same DNA testing company can occur in three ways:

  • The same person tests twice at the same DNA testing company.
  • The same person tests once at the DNA testing company and uploads a test from a different testing company. Only two of the primary four DNA testing companies accept uploads from other vendors – FamilyTreeDNA and MyHeritage.
  • The same person uploads two different files from other DNA testing companies to the DNA testing company in question. For example, the DNA company could be FamilyTreeDNA and the two uploaded DNA files could be from either MyHeritage, 23andMe or Ancestry.

All DNA testing companies allow users to download their raw DNA data files. This enables the tester to upload their DNA file to the vendors who accept uploaded files. Both FamilyTreeDNA and MyHeritage provide matching for free, but advanced tools require a small unlock fee of $19 and $29, respectively.

Testing Company Accepts Uploads from Other Companies Download Upload Instructions
23andMe No Instructions here
Ancestry No Instructions here
FamilyTreeDNA Yes, some Instructions here
MyHeritage Yes, some Instructions here

I wrote about developing a DNA testing and transfer/upload strategy, here, and about which companies accept which tests, here.

Not all DNA files are created equal. Therefore, not all files from vendors are compatible with other vendors for various reasons.

Multiple Tests at the Same DNA Testing Company

I have at least two tests at each of the four major vendors. I did this for research purposes, meaning to write articles to share with you.

If you actually test twice at a vendor, meaning purchase two separate tests and take them yourself, you will have two test results at that testing company. At some companies, specifically 23andMe, if you purchase a new test through their “upgrade” procedure, you won’t have two tests, just the newer one.

However, if you’re testing at the DNA testing company, and also uploading, I generally don’t recommend more than one test at each vendor. All it really does is clog up people’s match lists with no or little additional benefit. At 23andMe, with their restrictions on the size of your match list, if everyone had two tests, the effective match limit would be half of their stated limit of about 1500 matches for earlier testers and about 5000 for current testers with subscriptions.

So, in essence, I’m telling you to “do as I say, not as I do.” We all have better things to do with our money rather pay for the same test twice. If you haven’t tested your Y-DNA or mitochondrial DNA, that’s much more beneficial than two autosomal tests at one vendor.

Chips and Chip Evolution

Before we begin the side-by-side comparison, let’s briefly discuss DNA testing chips and how they work.

Each DNA testing company purchases DNA processing equipment. Illumina is the big dog in this arena. Illumina defines the capacity and structure of each chip. In part, how the testing companies use that capacity, or space on each chip, is up to each company. This means that the different testing companies test many of the same autosomal DNA SNP locations, but not all of the same locations.

Furthermore, the individual testing companies can specify a number of “other” locations to be included on their chip, up to the chip maximum size limit. The testing companies who offer Y-DNA or mitochondrial DNA haplogroups from autosomal tests use part of their chip array space for selected known haplogroup-defining SNP locations. This does NOT mean that Y-DNA or mitochondrial DNA is autosomal, just that the testing company used part of their chip array space to target these SNPs in your genome. Of course, for your most refined haplogroup and Y-DNA or mitochondrial DNA matching, you have to take those specific tests at FamilyTreeDNA .

This means that each testing company includes and reports many of the same, but also some different SNP locations when they scan your DNA.

In the lab, after your DNA is extracted from either your saliva or the cheek swab, it’s placed on this array chip which is then placed in the processing equipment.

There are several steps in processing your DNA. Each DNA location specified on the chip is scanned and read multiple times, and the results are recorded. The final output is the raw DNA results file that you see if/when you download your raw DNA file.

Here’s an example from my file. The RSID is the reference SNP cluster ID which is the naming convention used for specific SNPs. It’s not relevant to you, but it is to the lab, along with the chromosome number and position, which is in essence the address on the chromosome.

In the Result column, your file reports one nucleotide (T, A, C or G) that you inherited from each parent at each tested position. They are not listed in “parent order” because your DNA is not organized in that fashion. There’s no way for the lab to know which nucleotide came from which parent, unless they are the same, of course. You can read about nucleotides, here.

When you upload your raw DNA file to a different DNA testing company (vendor), they have to work with a file that isn’t entirely compatible with the files they generate, or the other files uploaded from other DNA testing companies.

In addition to dealing with different file formats and contents from multiple DNA vendors, companies change their own chips and file structure from time to time. In some cases, it’s a forced change by the chip manufacturer. Other times, the vendors want to include different locations or make improvements. For example, with 23andMe’s focus on health, they probably add new medically related SNP locations regularly. Regardless of why, some DNA files include locations not included in other files and are not 100% compatible.

Looking at the first few entries in my example file above, let’s say that the testing vendor included the first ten positions, but an uploaded file from another company did not. Or perhaps the chip changed, and a different version of the company’s own file contains different positions.

DNA testing companies have to “fill in the blanks” for compatibility, and they do this using a technique called imputation. Illumina forced their customers to adopt imputation in 2017 when they dropped the capacity of their chip. I was initially quite skeptical, but imputation has worked surprisingly well. Some of the matching differences you will see when comparing the results of two different DNA files is a result of imputation.

I wrote about imputation in an early article here. Please note the companies have fixed many issues with imputation and improved matching greatly, but the concepts and imputation processes still apply. The downloaded raw data files are your results BEFORE imputation, meaning that it’s up to any company where you upload to process your raw file in the same way they would process a file that they generated. A lot goes on behind the scenes when you upload a file to a DNA testing company.

At both 23andMe and Ancestry, you know that all of your matches tested there, meaning they did not upload a file from another testing company. You don’t know and can’t tell what chip was utilized when your matches tested. The only way to determine a chip testing version, aside from knowing the date or remembering the chip version from when you tested, is to look at the beginning of the raw data download file, although not all files contain that information.

Ok, now that you understand the landscape, let’s look at my results at each company.

23andMe

I tested twice at 23andMe on two different chip versions, V3 and V4, which tested some different locations of my DNA. Neither of these chips is the current version. I originally tested twice to evaluate the differences between the two test versions which you can read about, here.

23andMe named their ethnicity results Ancestry Composition.

They last updated my V3 test’s Ancestry Composition results on July 28, 2021.

The percentages are shown at left, and the country locations are highlighted at right for my 23andMe V3 test.

Click to enlarge any graphic

The 23andMe V4 test was also updated for the last time on July 28, 2021.

The ethnicity results differ substantially between the two chip versions, even though they were both updated on the same date.

In October of 2020, in an effort to “encourage” their customers to pay for a new test on their V5 chip, 23andMe announced that there would be no ethnicity updates on older tests. So, I really don’t know for sure when my tests were actually updated. Just note how different the results are. It’s also worth mentioning that 23andMe does not show trace amounts on their map, so even though my Indigenous American results were found, they aren’t displayed on the map.

Indigenous is, however, shown in yellow on their DNA Chromosome Painting.

No other testing company restricts updates, penalizing their customers who purchased earlier versions of tests.

Matches at 23andMe

23andMe limits your matches to about 1500 unless you have purchased the current test, including health AND pay for an annual $69 subscription which buys you about 5000 matches. I have not purchased this test.

Your number of actual matches displayed/retained is also affected by how many people you have communicated with, or at least initiated communications with. 23andMe does not roll those people off of your match list.

I have 1803 matches on both of my tests, meaning I’ve reached out to about 300 people who would have otherwise been removed from my match list. 23andMe retains your highest matches, deleting lower matches after you reach the maximum match threshold.

I’ve randomly evaluated several of the same matches at each vendor, at least five maternal and five paternal, separated by a blank row. I wanted to determine whether they match me on the same number of centimorgans, meaning the same amount of DNA, on both tests, and the same number of segments.

Match 23and Me V3 23and Me V4
Patricia 292 cM – 12 segments Same as V3
Joe 148 cM, 8 segments Same
Emily 73 cM, 4 segs 72 cM, 4 seg
Roland 27 cM, 1 seg Same
Ian 62 cM, 4 seg Same
Stacy 469 cM, 16 segments 482 cM, 16 segments
Harold 134 cM, 6 segments Same
Dean 69 cM, 3 seg Same
Carl 95 cM, 4 seg Same
Debbie 83 cM, 4 seg 84 cM, 4 seg

As you can see, the matches are either exact or xclose.

Please note that bolded matches are also found at another company. I will include a summary table at the end comparing the same match across multiple vendors.

23and Me Summary

The 23andMe V3 and V4 match results are very close. Since the match limit is the same, and the results are so close between tests, they are essentially identical in terms of matching.

The ethnicity results are similar, but the V4 test reflects a broader region. Italian baffles me in both versions.

Ethnicity should never be taken at face value at any DNA testing company, especially with smaller percentages which could be noise or a combination of other regions which just happens to resemble Italy, in my case.

I don’t know what type of comparison the current chip would yield since I suspect it has more medical and less genealogical SNPs on board.

Reprocessing Tests

This is probably a good place to note that it’s very expensive for any company to update their customer’s ethnicity results because every single customer’s DNA results file must be completely rerun. Note that this does not mean their DNA itself is retested. The output raw data file is reprocessed using a new algorithm.

Rerunning means reprocessing that specific portion of every test, meaning the vendors must rent “time in the cloud.” We are talking millions of dollars for each run. I don’t know how much it costs per test, but think about the expense if it takes $1 to rerun each test in the vendor’s database. Ancestry has more than 20 million tests.

While we, as consumers, are always chomping at the bit for new and better ethnicity results – the testing companies need to be sure it really is “better,” not just different before they invest the money to reprocess and update results.

This is probably why 23andMe decided to cease updating older kits. The newer tests require a subscription which is recurring revenue.

The same is true when DNA testing companies need to rematch their entire user base. This happens when the criteria for matching changes. For example, Ancestry purged a large number of matches for all of their customers back in 2020. While match algorithm changes necessitate rematching, with associated costs, this change also provided Ancestry with the huge benefit of eliminating approximately half of their customer’s matches. This freed up storage space, either physically in their data center or space rented in the cloud, representing substantial cost-savings.

How long can a DNA testing company reasonably be expected to continue investing in a product which never generates additional revenue but for which the maintenance and reinvestment costs never end?

Ancestry and MyHeritage both hope to offset the expenses of maintaining their customer’s DNA tests and providing free updates by selling subscriptions to their record services. 23andMe wants you to purchase a new test and a yearly subscription. FamilyTreeDNA wants you to purchase a Big Y-DNA and mitochondrial DNA test.

OK, now let’s look at my matches at Ancestry.

Ancestry

I’ve taken two Ancestry tests, V1 and V2. There were some differences, which I wrote about here and here. V2 is no longer the current chip.

Except for 23andMe who wants their customers to purchase their most current test, the other companies no longer routinely announce new chip versions. They just go about their business. The only way you know that a vendor actually changed something is when the other companies who accept uploads suddenly encounter an issue with file formats. It always takes a few weeks to sort that out.

My Ancestry V1 test’s ethnicity results don’t show my Native American ethnicity.

Ancestry results were updated in June 2022

However, my V2 results do include Native American ethnicity.

Matches at Ancestry

I have many more matches on my V1 test at Ancestry because I took steps to preserve my smaller matches when Ancestry initiated its massive purge in 2020. I wrote about that here and here.

Ancestry’s SideView breaks matches down into maternal, paternal, and unassigned based on your side selection. You tell Ancestry which side is which. You may be able to determine which “side” is maternal or paternal either by your ethnicity or shared matches. While SideView is not always accurate, it’s a good place to begin.

Match Category Ancestry V1 Test Ancestry V2 Test
Maternal 15,587 15,116
Paternal 42,247 41,870
Both 2 2
Unassigned 48,999 4,127
Total 106,835 61,115

Ancestry either displays all your matches or your matches by side, which I used to compile the table above. I suspect that Ancestry is not assigning any of the smaller preserved matches to “sides” based on the numbers above.

Ancestry implemented a process called Timber that removes DNA that they feel is “too matchy,” meaning you match enough people in this region that they think it’s a pileup region for you personally, and therefore not useful. In some cases, enough DNA is removed causing that person to no longer be considered a match because they fall beneath the match threshold. I am not a fan of Timber.

Your match amount shown is AFTER Timber has removed those segments. Unweighted shared DNA is your pre-Timber match amount.

You can view the Unweighted shared DNA by clicking on the amount of shared DNA on your match list.

You can read Ancestry’s Matching White Paper, here.

Let’s take a look at my matches. I’ve listed both weighted and unweighted where they are different.

Match Ancestry V1 Ancestry V2
Michael 755 cM, 35 seg 737 cM, 33 seg
Edward 66 cM, 4 seg (unweighted 86 cM) 65 cM, 4 seg (unweighted 86 cM)
Tom 59 cM, 3 seg (unweighted 63) Same
Jonathon 43 cM, 4 seg, (unweighted 52 cM) Same
Matthew 20 cM, 2 seg (unweighted 35 cM) Same
Harold 132 cM, 7 seg 135 cM, 6 seg
Dean 67 cM, 4 seg (unweighted 78 cM) 66 cM, 4 seg (unweighted 78 cM)
Debbie 93 cM, 5 seg Same
Valli 142 cM, 3 seg Same
Jared 20 cM, 1 seg (unweighted 22 cM) Same

Timber only removes DNA when the match is under 90 cM. Almost every match under 90 cM has some DNA removed.

Ancestry Summary

The results of the two Ancestry tests are very close.

In some circumstances, no DNA is removed by Timber, so the unweighted is the same as the weighted. However, in other cases, a significant amount is removed. 15 cM of Matthew’s 35 cM was removed by Timber, reducing his total to 20 cM.

Remember that Ancestry does not show shared matches unless they are greater than 20 cM, which is different than any other DNA testing company.

At one point, Ancestry was selling a health test that was also a genealogy test. That test utilized a different chip that is not accepted for uploads by other vendors. The results of that test might well be different that the “normal” Ancestry tests focused on genealogy. The Ancestry health test is no longer offered.

Companies that Accept Uploads

DNA testing companies that accept uploaded DNA files from other DNA testing companies need to process the uploaded file, just like a file that is generated in their own lab. Of course, they must deal with the differences between uploaded files and their own file format. The processing includes imputation and formulates the uploaded file so that it works with the tools that they provide for their customers, including ethnicity (by whatever name they use) matching, family matching (bucketing), advanced matching, the match matrix, triangulation, AutoClusters, Theories of Family Relativity, and other advanced tools.

Of course, the testing company accepting uploads can only work with the DNA locations provided by the original DNA testing company in the uploaded file.

Matching and some additional tools are free to uploaders, but advanced tools require an inexpensive unlock.

FamilyTreeDNA

I took a test at FamilyTreeDNA, plus uploaded a copy of both of my Ancestry DNA files.

FamilyTreeDNA named their population (ethnicity) test myOrigins and the current version is V3. I wrote about the rollout and comparison in September of 2020, here.

My DNA test taken at FamilyTreeDNA, above, reveals Native American segments that match reference populations found both in North and South America and the Caribbean Islands.

At FamilyTreeDNA, my Ancestry V1 uploaded file results show Native American population matches only in North America.

Interestingly, my Ancestry V1 file processed AT Ancestry did not reveal Native American ancestry, but the same file uploaded to and processed at FamilyTreeDNA did show Native American results, reflecting the difference between the vendors’ internal algorithms and reference populations utilized.

My myOrigins results from my Ancestry V2 uploaded file at FamilyTreeDNA also include my North American Native American segments. The V2 test also showed Native American ethnicity at Ancestry, so clearly something changed in Ancestry’s algorithm, locations tested, and/or reference populations between V1 and V2.

Fortunately, FamilyTreeDNA provides both chromosome painting and a population download file so I can match those Native segments with my autosomal matches to identify which of my ancestors contributed those specific segments.

One of my Native segments is shown in pink on Chromosome1. My mother has a Native segment in exactly the same location, so I know that this segment originated with my mother’s ancestors.

I downloaded the myOrigins population segment file and painted my results at DNAPainter, along with the matches where I can identify our common ancestor. This allowed me to pinpoint the ancestral line that contributed this Native segment in my maternal line. You can read about using DNAPainter, here.

FamilyTreeDNA Matches

I have significantly more matches at FamilyTreeDNA on their test than on either of my Ancestry tests that I uploaded. However, nearly the same number are maternally or paternally assigned through Family Matching, with the remainder unassigned. You can read about Family Matching here.

Match Category FamilyTreeDNA Test Ancestry V1 at FamilyTreeDNA Ancestry V2 at FamilyTreeDNA
Paternal 3,479 3,572 3,422
Maternal 1,549 1,536 1,477
Both 3 3 3
All 8,154 6,397 6,579

Family matching, aka bucketing, automatically assigns my matches as maternal and paternal by linking known relatives to their place in my tree.

I completed the following match chart using my original test taken at FamilyTreeDNA, plus the same match at FamilyTreeDNA for both of my Ancestry tests.

In other words, Cheryl matched me at 467 cM on 21 segments on the original test taken at FamilyTreeDNA. She matched me on 473 cM and 21 segments on my Ancestry V1 test uploaded to FamilyTreeDNA and on 483 cM and 22 segments on the Ancestry V2 test uploaded to FamilyTreeDNA.

Match FamilyTreeDNA Ancestry V1 at FTDNA Ancestry V2 at FTDNA
Cheryl 467 cM, 21 seg 473 cM, 21 seg 483 cM, 22 seg
Patricia 195 cM, 11 seg 189 cM, 11 seg 188 cM, 11 seg
Tom 77 cM, 4 seg 71 cM, 4 seg 76 cM, 4 seg
Thomas 72 cM, 3 seg 71 cM, 3 seg 74 cM, 3 seg
Roland 29 cM, 1 seg 35 cM, 2 seg 35 cM, 2 seg
Rex 62 cM, 4 seg 55 cM, 3 seg 57 cM, 3 seg
Don 395 cM, 18 seg 362 cM, 15 seg 398 cM, 18 seg
Ian 64 cM, 4 seg 56 cM, 4 seg 64 cM, 4 seg
Stacy 490 cM, 18 seg 494 cM, 15 seg 489 cM, 14 seg
Harold 127 cM, 5 cM 133 cM, 6 seg 143 cM, 6 seg
Dean 81 cM, 4 seg 75 cM, 3 seg 83 cM, 4 seg
Carl 103 cM, 4 seg 101 cM, 4 seg 102 cM, 4 seg
Debbie 99 cM, 5 seg 97 cM, 5 seg 99 cM, 5 seg
David 373 cM, 16 seg 435 cM, 19 seg 417 cM, 18 seg
Amos 176 cM, 7 seg 177 cM. 8 seg 177 cM, 7 seg
Buster 387 cM, 15 seg 396 cM, 16 seg 402 cM, 17 seg
Charlene 461 cM, 21 seg 450 cM, 21 seg 448 cM, 20 seg
Carol 65 cM, 6 seg 64 cM, 6 seg 65 cM, 6 seg

I have tested many of my cousins at FamilyTreeDNA and encouraged others to test or upload. I’ve attempted to include enough people so that I can have common matches at least at one other DNA testing company for comparison.

FamilyTreeDNA Summary

The matches are relatively close, with a few being exact.

Interestingly, some of the segment counts are different. In most cases, this results from one segment being broken into multiple segments by one or more of the tests, but not always. In the couple that I checked, the entire segment seems to descend from the same ancestral couple, so the break is likely a result of not all of the same DNA locations being tested, plus the limits of imputation.

MyHeritage

I have two tests at MyHeritage. One taken at MyHeritage, and an uploaded file from FamilyTreeDNA.

MyHeritage displays both ethnicity results and Genetic Groups which maps groups of people that you match. I left the Genetic Groups setting at the highest confidence level. Shifting it to lower displays additional Genetic Groups, some of which overlap with or are within ethnicity regions.

My test taken at MyHeritage, above, shows several ethnicities and Genetic Groups, but no Native American.

My FamilyTreeDNA kit processed at MyHeritage shows the same ethnicity regions, one additional Genetic Group, plus Native American heritage in the Amazon which is rather surprising given that I don’t show Native in North American regions where I’m positive my Native ancestors lived.

MyHeritage Matching

At MyHeritage, I compared the results of the test I took with MyHeritage, and a test I uploaded from FamilyTreeDNA. Fewer than half of my matches can be assigned to a parent via shared matching.

Matches MyHeritage Test FamilyTreeDNA at MyHeritage
Paternal 4,422 6,501
Maternal 2,660 3,655
Total 13,233 16,147

I have rounded my matches at MyHeritage to the closest cM.

Match MyHeritage Test FamilyTreeDNA at MyHeritage
Michael 801 cM, 32 seg 823 cM, 31 segments
Cheryl 467 cM, 23 seg 477 cM, 23 seg
Roland No match 28 cM, 1 seg
Patty 156 cM, 9 seg 151 cM, 9 seg
Rex 43 cM, 4 seg 53 cM, 3 seg
Don 369 cM, 16 seg 382 cM, 17 seg
 
David 449 cM, 17 seg 460 cM, 17 seg
Charlene 454 cM, 23 seg 477 cM, 24 seg
Buster 408 cM, 15 seg 410 cM, 16 seg
Amos 183 cM, 8 seg Same
Carol 78 cM, 6 seg 87 cM, 7 seg

MyHeritage Summary

I was surprised to discover that Roland had no match with the MyHeritage test, but did with the FamilyTreeDNA test. I wonder if this is a searching or matching glitch, especially since both companies use the same chip. 28 cM in one segment is a reasonably large match, and even if it was divided in two, it would still be over the matching threshold. I know this is a valid match because Roland triangulates with me and several cousins, I’m positive of our common ancestor, and he also matches me at both FamilyTreeDNA and 23andMe.

Other than that, the matches are reasonably close, with one being exact.

Your Matches Aren’t Everyplace

I unsuccessfully searched for someone who was a match to me in all four databases. Ancestry does not permit match downloads, so I had to search manually. People don’t always use the same names in different databases.

Surprisingly, I was unable to find one match who is in all of the databases. Many people only suggest testing at Ancestry because they have the largest database, but if you look at the following comparison chart that I’ve created, you’ll see that 16 of 26 people, or 62% were not at Ancestry. Conversely, many people were at Ancestry and not elsewhere. I could not find five maternal and five paternal matches at Ancestry that I could identify as matches in another database. 40% were not elsewhere.

If you think for one minute that it doesn’t matter for genealogy if you’re in all four major databases, please reconsider. It surely does matter.

Every single vendor has matches that the others don’t. Substantial, important matches. I have found first and second-cousin matches in every database that weren’t elsewhere.

Many of the original testers have passed away and can’t test again. My mother can never test at either 23andMe or Ancestry, but she is at both FamilyTreeDNA and MyHeritage because I could upgrade her kit at FamilyTreeDNA after she died. I uploaded her to MyHeritage. Of course, because she is a generation closer to our ancestors, she has many valuable matches that I don’t.

Each vendor provides either an email address or a messaging platform for you to contact your matches. Don’t be discouraged if they don’t answer. Just today, I received a reply that was years in the making.

Genealogists hope for immediate gratification, but we are actually in this for the long game. Play it with every tool at your disposal.

The Answer

Does it matter if you test at a DNA testing company, or upload a file?

I know this was a very long answer to what my readers hoped was a simple yes or no question.

There is no consistent answer at either FamilyTreeDNA or MyHeritage, the two DNA testing companies that accept uploads. Be sure you’re in both databases. My closest two matches that I did not test were found at MyHeritage. Here’s a direct link to upload at MyHeritage.

Of the vendors, those two should be the closest to each other because they are both processed in the GenebyGene lab, but again, the actual chip version, when the test was originally taken, and each vendor’s internal processing will result in differences. Neither the original test at the DNA testing company nor the uploaded files have consistently higher or lower matches. Neither type of test or upload appears to be universally more or less accurate. Differences in either direction seem to occur on a match-by-match basis. Many are so close as to be virtually equivalent, with a few seemingly random exceptions. Of course, we always have to consider Timber.

If you upload, unlock the advanced features at both FamilyTreeDNA and MyHeritage.

If you upload to a DNA testing company, you may discover in the future that some features and functions will only be available to original testers.

Personally, if I had the option, I would test at the company directly simply because it eliminates or at least reduces the possibility of future incompatibilities – with the exception of 23andMe which has chosen to not provide consistent updates to older tests. I’m incredibly grateful I didn’t test my mother or now deceased family members at 23andMe, and only there. I would be heartsick, heartbroken, and furious.

Our DNA is an extremely valuable resource for our genealogy. It’s the gift that truly keeps on giving, day after day, even when other records don’t exist. Be sure you and your family members are in each database one way or another, and test your Y-DNA (for males) and mitochondrial DNA (for everyone) to have a complete arsenal at your disposal.

_____________________________________________________________

Follow DNAexplain on Facebook, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

What Is a Sibling Anyway? Full, Half, Three-Quarters, Step, Adopted, Donor-Conceived & Twins

Posted on by
12

I’ve seen the term sibling used many different ways, sometimes incorrectly.

When referring to their own siblings, people usually use the term brother or sister, regardless of whether they are talking about a full, half or step-sibling. It’s a term of heart or description. It’s often genealogists who are focused on which type of sibling. As far as I’m concerned, my brother is my brother, regardless of which type of brother. But in terms of genetics, and genealogy, there’s a huge difference. How we feel about our sibling(s) and how we are biologically related are two different things.

Let’s cover the various types of siblingship and how to determine which type is which.

  • Full Siblings – Share both parents
  • Half-Siblings – Share only one parent
  • Three-Quarter Siblings – It’s complicated
  • Adopted Siblings
  • Donor-Conceived
  • Step-Siblings – Share no biological parent
  • Twins – Fraternal and Identical

Full Siblings

Full siblings share both parents and share approximately 50% of their DNA with each other.

You can tell if you are full siblings with a match in various ways.

  1. You share the same fairly close matches on both parents’ sides. For example, aunts or uncles or their descendants.

Why do I say close matches? You could share one parent and another more distant relative on the other parent’s side. Matching with close relatives like aunts, uncles or first cousins at the appropriate level is an excellent indicator unless your parents or grandparents are available for testing. If you are comparing to grandparents, be sure to confirm matches to BOTH grandparents on each side.

  1. Full siblings will share in the ballpark of 2600 cM, according to DNAPainter’s Shared cM Tool.

Keep in mind that you can share more or less DNA, hence the range. It’s also worth noting that some people who reported themselves as full siblings in the Shared cM project were probably half siblings and didn’t realize it.

  1. Full siblings will share a significant amount of fully identical regions (FIR) of DNA with each other, meaning they share DNA at the same DNA address from both parents, as illustrated above. Shared DNA with each other inherited from Mom and Dad are blocked in green. The fully identical regions, shared with both parents, are bracketed in purple. You can’t make this determination at FamilyTreeDNA, MyHeritage or Ancestry, but you can at both 23andMe and GEDmatch.

At GEDmatch, the large fully green areas in the chromosome browser “graphics and positions” display indicates full siblings, where DNA is shared from both parents at that location.

I wrote about the details of how to view fully identical regions (FIR) versus half identical regions (HIR) in the article, DNA: In Search of…Full and Half-Siblings.

  1. If your parents/grandparents have tested, you and your full sibling will both match both parents/grandparents. Yes, I know this sounds intuitive, but sometimes it’s easy to miss the obvious.

At FamilyTreeDNA, you can use the matrix tool to see who matches each other in a group of people that you can select. In this case, both siblings are compared to the father, but if the father isn’t available, a close paternal relative could substitute. Remember that all people who are 2nd cousins or closer will match.

  1. At Ancestry, full siblings will be identified as either “brother” or “sister,” while half-siblings do not indicate siblingship. Half-siblings are called “close family” and a range of possible relationships is given. Yes, Ancestry, is looking under the hood at FIR/HIR regions. I have never seen a full sibling misidentified as anything else at Ancestry. Unfortunately, Ancestry does not give customers access to their matching chromosome segment location data.
  2. Y-DNA of males who are full siblings will match but may have some slight differences. Y-DNA alone cannot prove a specific relationship, with very rare exceptions, but can easily disprove a relationship if two males do not match. Y-DNA should be used in conjunction with autosomal DNA for specific relationship prediction when Y-DNA matches.
  3. Y-DNA testing is available only through FamilyTreeDNA, but high-level haplogroup-only estimates are available through 23andMe. Widely divergent haplogroups, such as E versus R, can be considered a confirmed non-match. Different haplogroups within the same base haplogroup, such as R, but obtained from different vendors or different testing levels may still be a match if they test at the Big Y-700 level at FamilyTreeDNA.
  4. Mitochondrial DNA, inherited matrilineally from the mother, will match for full siblings (barring unusual mutations such as heteroplasmies) but cannot be used in relationship verification other than to confirm nonmatches. For both Y-DNA and mitochondrial DNA, it’s possible to have a lineage match that is not the result of a direct parental relationship.
  5. Mitochondrial DNA testing is available only through FamilyTreeDNA, but haplogroup-only estimates are included at 23andMe. Different base haplogroups such as H and J can be considered a non-match.
  6. A difference in ethnicity is NOT a reliable indicator of half versus full siblings.

Half-Siblings

Half-siblings share only one parent, but not both, and usually share about 25% of their DNA with each other.

You will share as much DNA with a half-sibling as you do some other close matches, so it’s not always possible for DNA testing companies to determine the exact relationship.

Referencing the MyHeritage cM Explainer tool, you can see that people who share 1700 cM of DNA could be related in several ways. I wrote about using the cM Explainer tool here.

Hints that you are only half-siblings include:

  1. At testing vendors, including Ancestry, a half-sibling will not be identified as a sibling but as another type of close match.
  2. If your parents or grandparents have tested, you will only match one parent or one set of grandparents or their descendants.
  3. You will not have shared matches on one parent’s side. If you know that specific, close relatives have tested on one parent’s side, and you don’t match them, but your other family members do, that’s a very big hint. Please note that you need more than one reference point, because it’s always possible that the other person has an unknown parentage situation.
  4. At 23andMe, you will not show fully identical regions (FIR).
  5. At GEDmatch, you will show only very minimal FIR.

Scattered, very small green FIR locations are normal based on random recombination. Long runs of green indicate that significant amounts of DNA was inherited from both parents. The example above is from half-siblings.

  1. At FamilyTreeDNA and 23andMe, most men who share a mother will also share an X chromosome match since men only inherit their X chromosome from their mother. However, it is possible for the mother to give one son her entire X chromosome from her father, and give the other son her entire X chromosome from her mother. Therefore, two men who do share a mother but don’t have an X chromosome match could still be siblings. The X is not an entirely reliable relationship predictor. However, if two men share an entire X chromosome match, it’s very likely that they are siblings on their mother’s side, or that their mothers are very close relatives.

Three-Quarter Siblings

This gets a little more complicated.

Three-quarter siblings occur when one parent is the same, and the other parents are siblings to each other.

Let’s use a real-life example.

A couple marries and has children. The mother dies, and the father marries the mother’s sister and has additional children. Those children are actually less than full siblings, but more than half-siblings.

Conversely, a woman has children by two brothers and those children are three-quarter siblings.

These were common situations in earlier times when a man needed a female companion to raise children and women needed a male companion to work on the farm. Neither one could perform both childcare and the chores necessary to earn a living in an agricultural society, and your deceased spouse’s family members were already people you knew. They already loved your children too.

Neither of these situations is historically unusual, but both are very difficult to determine using genetics alone, even in the current generation.

Neither X-DNA nor mitochondrial DNA will be helpful, and Y-DNA will generally not be either.

Unfortunately, three-quarter siblings’ autosomal DNA will fall in the range of both half and full siblings, although not at the bottom of the half-sibling range, nor at the top of the full sibling range – but that leaves a lot of middle ground.

I’ve found it almost impossible to prove this scenario without prior knowledge, and equally as impossible to determine which of multiple brothers is the father unless there is a very strong half-sibling match in addition.

The DNA-Sci blog discusses this phenomenon, but I can’t utilize comparison screenshots according to their terms of service.

Clearly, what we need are more known three-quarter siblings to submit data to be studied in order to (possibly) facilitate easier determination, probably based on the percentage frequency distribution of FIR/HIR segments. Regardless, it’s never going to be 100% without secondary genealogical information.

Three-quarter siblings aren’t very common today, but they do exist. If you suspect something of this nature, really need the answer, and have exhausted all other possibilities, I recommend engaging a very experienced genetic genealogist with experience in this type of situation. However, given the random nature of recombination in humans, we may never be able to confirm using any methodology, with one possible exception.

There’s one possibility using Y-DNA if the parents in question are two brothers. If one brother has a Y-DNA SNP mutation that the other does not have, and this can be verified by testing either the brothers who are father candidates or their other known sons via the Big Y-700 test – the father of the siblings could then be identified by this SNP mutation as well. Yes, it’s a long shot.

Three-quarter sibling situations are very challenging.

Step-siblings, on the other hand, are easy.

Step-Siblings

Step-siblings don’t share either parent, so their DNA will not match to each other unless their parents are somehow related to each other. Please note that this means either of their parents, not just the parents who marry each other.

One child’s parent marries the other child’s parent, resulting in a blended family. The children then become step-siblings to each other.

The terms step-sibling and half-sibling are often used interchangeably, and they are definitely NOT the same.

Adopted Siblings

Adopted siblings may not know they are adopted and believe, until DNA testing, that they are biological siblings.

Sometimes adopted siblings are either half-siblings or are otherwise related to each other but may not be related to either of their adoptive parents. Conversely, adopted siblings, one or both, may be related to one of their adoptive parents.

The same full and half-sibling relationship genetic clues apply to adopted siblings, as well as the tools and techniques in the In Search of Unknown Family series of articles.

Donor-Conceived Siblings

Donor-conceived siblings could be:

  • Half-siblings if the donor is the same father but a different mother.
  • Half-siblings if they share an egg donor but not a father.
  • Full siblings if they are full biological siblings to each other, meaning both donors are the same but not related to the woman into whom the fertilized egg was implanted, nor to her partner, their legal parents.
  • Not biologically related to each other or either legal parent.
  • Biologically related to one or both legal parents when a family member is either an egg or sperm donor.

Did I cover all of the possible scenarios? The essence is that we literally know nothing and should assume nothing.

I have known of situations where the brother (or brothers) of the father was the sperm donor, so the resulting child or children appear to be full or three-quarters siblings to each other. They are related to their legal father who is the mother’s partner. In other words, in this situation, the mother’s husband was infertile, and his brother(s) donated sperm resulting in multiple births. The children from this family who were conceived through different brothers and had very close (half-sibling) matches to their “uncles'” children were very confused until they spoke with their parents about their DNA results.

The same techniques to ascertain relationships would be used with donor-conceived situations. Additionally, if it appears that a biological relationship exists, but it’s not a full or half-sibling relationship, I recommend utilizing other techniques described in the In Search of Unknown Family series.

Twins or Multiple Birth Siblings

Two types of twin or multiple birth scenarios exist outside of assisted fertilization.

Fraternal twins – With fraternal or dizygotic twins, two eggs are fertilized independently by separate sperm. Just view this as one pregnancy with two siblings occupying the same space for the same 9 months of gestation. Fraternal twins can be male, female or one of each sex.

Fraternal twins are simply siblings that happen to gestate together and will match in the same way that full siblings match.

Please note that it’s possible for two of a woman’s eggs to be fertilized at different times during the same ovulation cycle, potentially by different men, resulting in twins who are actually half-siblings.

A difference in ethnicity is NOT a reliable indicator of fraternal or identical twins. Submitting your own DNA twice often results in slightly different ethnicity results.

Identical twins – Identical or monozygotic twins occur when one egg is fertilized by one sperm and then divides into multiple embryos that develop into different children. Those children are genetically identical since they were both developed from the same egg and sperm.

Two of the most famous identical twins are astronauts Mark and Scott Kelly.

Identical twins are the same sex and will look the same because they have the same DNA, except for epigenetic changes, but of course external factors such as haircuts, clothes and weight can make identical twins physically distinguishable from each other.

DNA testing companies will either identify identical twins as “self,” “identical twin” or “parent/child” due to the highest possible shared cM count plus fully matching FIR regions.

For identical twins, checking the FIR versus HIR is a positive identification as indicated above at GEDmatch with completely solid green FIR regions. Do not assume twins that look alike are identical twins.

Siblings

Whoever thought there would be so many kinds of siblings!

If you observe the need to educate about either sibling terminology or DNA identification methodologies, feel free to share this article. When identifying relationships, never assume anything, and verify everything through multiple avenues.

_____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

So, You Want to Become a Professional Genetic Genealogist

Posted on by
10

I get asked quite often about what is required to become a professional genetic genealogist.

That’s actually two separate questions.

  • What is required to become a professional genealogist?
  • Then, what is required to specialize as a genetic genealogist?

What It’s Not

Before we have this discussion, I need to make sure that you understand that I’m NOT talking about forensics, meaning IGG, or investigative genetic genealogy in this article.

  • This is NOT forensics (IGG)
  • This is also not a specialty in finding missing parents for adoptees and others searching for unknown parents.

Both IGG and adoption searches utilize the same methodology, a subset of genetic genealogy. I wrote about that in Identifying Unknown Parents and Individuals Using DNA Matching.

The difference between genetic genealogy more broadly and IGG is:

  • What you’re searching for
  • The perspective
  • The methods utilized.

Essentially, the functional difference is that genealogists know who they are and have some information about their ancestors. For example, they know who their parents are and probably at least their grandparents. Genealogists are using both DNA testing and traditional genealogical paper trail research methods to focus and make discoveries going backwards in time.

Both IGG and unknown parent research uses DNA and (sometimes some) paper trail genealogy to find ways to connect the closest matches to the DNA tester (or DNA sample) together to each other to identify either living or recently living people. For example, two people who are are first cousins to the tester should both have the same grandparents if they are related to the tester through the same parent.

If two people who are related to the tester as first cousins do not share the same grandparent(s), then they are related to the tester through different parents of the tester.

The commonality is that DNA testing and some types of records are used for:

  • IGG where you’re searching for the identity of the tester or DNA sample
  • Unknown parent(s) searches where you are searching for the identity of the parent(s)
  • Genetic genealogy

However, the search methodology is different for IGG and unknown parents than for genealogy.

With IGG and unknown parent searches, you’re looking for your closest matches, then attempting to connect them together to identify either currently living or recently living people.

This article focuses specifically on genealogy and genetic genealogy, meaning looking backwards in time to identify ancestors.

I wrote about the techniques used for both IGG and parental searching in the article, Identifying Unknown Parents and Individuals Using DNA Matching.

What Do Genealogists Do?

Genealogy is the study of family history and the descent of a person or a family. Genealogists use a variety of sources and methods to discover and show the ancestry of their subjects and in doing so, create the family trees that are familiar to all of us.

Genealogists use different sources and methods to find and show the descent and kinship of their subjects.

Traditional sources include but are not limited to the following record types:

  • Vital records (birth, marriage, and death certificates)
  • Census
  • Military
  • Immigration
  • Land and tax records
  • Wills and probate
  • Church records
  • Newspapers
  • Obituaries
  • Published and online books
  • Oral histories
  • Genealogy databases
  • And more

Of course, today the four types of DNA can be added to that list.

A professional genealogist needs to know how and where to find these types of records in the target area, any unique cultural or regional factors affecting those records, and how to interpret them both individually and together.

For example, in a deed record in colonial Virginia, why would, or wouldn’t a female release her dower right? What is dower right, and why is it important? How might that record, or lack thereof, affect future probate for that woman/couple? In what type of historical or court record book might one look for these types of records?

Genealogists also need to know how to weigh different types of information in terms of potential accuracy and how to interpret primary and secondary sources.

Primary sources are those that were created at or near the time of an event by someone who was present at the event or who had first-hand knowledge of it. Examples of primary sources include birth certificates, marriage licenses, and census records, although census records are far more likely to be inaccurate or incomplete than a birth certificate or marriage record. Genealogists need to understand why, and where to look for corroboration. Primary sources are considered to be most accurate.

Secondary sources are those that were created later by someone who did not have first-hand knowledge of the event. Examples of secondary sources include family histories and genealogies, published biographies, and sometimes, newspaper articles.

The genealogists “go to” source for understanding and interpreting evidence is Evidence Explained by Elizabeth Shown Mills, available here.

Of course, DNA understanding and analysis needs to be added to this list and has become an important resource in genealogy. Additionally, genetic genealogy has become a specialty within the broader field of genealogy, as has IGG.

Put another way, a genealogist should have expertise and a specialty in some area. Maybe Italian records, or Native American genealogy, or New England records, in addition to the basic skills. At one time, a genealogist didn’t necessarily HAVE TO have expertise in genetic genealogy as well, but that has changed in the past few years. A professional genealogist should MINIMALLY understand the basics of genetic genealogy and when/how it can be useful. They may or may not have ready access to a genetic genealogist within the company where they work.

Being an independent genealogist, unless you specialize only in a specific area, like Dutch genealogy, is much more challenging because you’ll need to be proficient in BOTH Dutch genealogy AND genetic genealogy. It’s tough keeping up with one specialty, let alone two, although in this case, Yvette does an amazing job. However, her primary specialty is Dutch genealogy, and genetic genealogy is the booster rocket when appropriate. Genetic genealogy is not always needed for traditional genealogy, which is why genetic genealogy is a specialty skill.

In addition to all that, you also need to be proficient and comfortable with technology and a good communicator. Walking on water is also helpful:)

Job Description

So, what does the job description for a genealogist look like?

I reached out to Legacy Tree Genealogists because they are one of the largest, if not the largest genealogy research company, and they partner with 23andMe, FamilyTreeDNA, and MyHeritage. Legacy Tree has specialists in many regions and languages, in addition to six genetic genealogists on staff.

Fortunately, they have a job listing posted right now, here, with an excellent description of what is expected.

If you’re interested or wish to sign up for notifications, click here.

Understanding that this job description won’t be posted forever, I reached out to the owner, Jessica Dalley Taylor, and asked if she would send me a sample description to include in this article.

Here you go, courtesy of Jessica:

About You

It’s not easy to make each client’s experience the very best it can possibly be, and it means we can only hire an exceptional genealogist for this position. You will be a great fit if:

    • You are fluent in English and can explain your genealogy discoveries in a way that clients connect with and understand
    • You have taken at least one genetic genealogy test or administered the test of a relative
    • You have introductory genetic genealogy abilities
    • You have at least intermediate traditional genealogical research experience in any geographic locality
    • You are familiar with the repositories of the areas for which you claim expertise and have worked with them to obtain documents
    • You are passionate about genealogy and are a creative problem solver
    • You are great at working independently and hitting deadlines (please don’t overlook this line about deadlines)
    • You are comfortable with Microsoft Office suite
    • You’re familiar with genealogical technology such as pedigree software
    • You have a quiet place to work without distractions, a computer, and great internet
    • You have a strong desire to work as a professional genetic genealogist

Even better if:

    • You have a basic understanding of genetic inheritance and its application to genealogy
    • You have beginning experience with interpretation and use of genetic genealogy test results
    • You have intermediate-level genetic genealogy abilities

What you’ll be doing at Legacy Tree:

    • You’ll be learning how to use genetic testing in identifying family
    • You’ll be learning how to create high-quality research reports
    • You’ll be reading and formatting reports by professional researchers
    • You’ll be assisting with researching and writing genealogy reports
    • You’ll be performing genetic genealogy analysis under the direction of professional mentors
    • You’ll be developing advanced-level genetic genealogy skills and abilities
    • With your input, you’ll do other things as opportunities and needs arise

Please note that Legacy Tree offers both traditional genealogy services, combined with genetic genealogy, along with adoption and unknown parent searches.

As a measure of fundamental basic genetic genealogy skills, you should be able to create and teach a class like First Steps When Your DNA Results Are Ready – Sticking Your Toe in the Genealogy Water.

You should also be able to read and fully comprehend the articles on this blog, as well as explain the content to others. A very wise person once told me that if you can’t explain or teach a topic, you don’t understand it.

As luck would have it, Ancestry also posted a job opening for a genealogist as I was finishing this article. Here’s part of the job requirements.

Contractor or Employee

Please note that many companies have shifted their primary hiring strategy to utilizing contractors for not more than half time, especially now that working remotely has become the norm.

This may or may not be good news for you.

It allows the company to avoid paying benefits like insurance, vacation, leave, and retirement programs which reduces their costs. You may not need these benefits, and it may represent an opportunity for you. For others who need those benefits, it’s a deal-breaker.

Contracting may provide the ability to work part-time, but contracting probably means you need to have business management skills not required when you work for someone else. Let’s just say that I make quarterly estimated tax payments and my annual CPA bill is in the $2,000 range.

Compensation

Pay, either as an employee or contractor for a company, is a sticky wicket in this field.

First, there’s a consumer mindset, although not universal, that genealogy “should be” free. In part, this is due to search angels and a history of well-intentioned people making things free. I’m one of them – guilty as charged – this blog is free. My hourly work, however, when I accepted clients (which I DO NOT now,) was not free.

However, that “should be free” mindset makes it difficult to shift to a “pay to play” mentality when people can go on social media and get what they want for free.

Professional services are not and should not be free.

Professionals should be able to earn a respectable living. The full-time Ancestry job, posted above, with those credentials, nets out to $21.63 per hour for a 40-hour week, with a graduate degree preferred. For comparison, google other jobs and professions.

If you doubt for one second whether professional services should or should not be free, especially ones that require a bachelor’s degree or master’s, just think about what your CPA would do if you asked them to do your taxes because they have the ability, for free. Same for a doctor, lawyer, or any other professional.

People are often shocked at the rates paid to employees versus the rates charged to prospective customers. This discussion has recently gotten spicy on social media, so I’m not going to comment other than to say that when I did take private clients, which I DO NOT ANYMORE, I found it much more beneficial to operate independently than to work for a company.

However, I also had a readily recognizable specialty and an avenue to reach potential clients.

I also already had a business structure set up, and a CPA, and perhaps more important than either of those – I had medical insurance already in place.

The need for benefits is what drives many people to work for companies, which I fully understand. It’s also a big factor in why there are more female genealogists than male genealogists. Married women in the US are eligible to be covered by their spouse’s insurance, assuming the spouse has insurance through their employer.

My very strong recommendation to you is to weigh all of the factors and NEVER to find yourself without medical insurance or coverage.

If you’re going to be “self-employed,” set up a company. If you’re going to set up a company, do it properly, understand the tax ramifications of the various types of corporations and engage a competent CPA to shepherd you through the process from day 1 through taxes. They are worth every penny.

Look at various jobs in the market, review at the associated pay, get a quote for genealogy services of the type you would be providing from the various companies – and decide if this profession is really for you.

I don’t mean to be a wet blanket, just a realist.

Training and Certification

Now for the good news and the bad news.

  • There is professional training for genealogy
  • There are certifications for genealogy
  • There is no “one place” for either
  • There is no certification for genetic genealogy
  • There’s a LOT of misunderstanding and misinformation about genetic genealogy
  • Genetic genealogy changes often

You need to view your education for genealogy/genetic genealogy in the same way you’d view obtaining a college degree – plus continuing education to maintain your education and skills at a current and functional level.

And yes, all of that costs money. If you decide to work for a company, be sure to ask if continuing ed is on their dime and time, or yours.

Genealogy Training

The Board for Certification of Genealogists, BCG, allows graduates to append CG, for Certified Genealogist after their name. BCG is focused on certification of skills and is not a training platform, although they do provide some webinars, etc. It’s not a college curriculum though. Certification is the “end game” for many. Candidates must submit a portfolio for evaluation, complete in a specific timeframe, and must reapply every five years to maintain their certification.

Not all genealogists are certified by BCG, and BCG only lists references of BCG members.

In the field of Genetic Genealogy, that can be problematic because many competent and well-known people are not BCG certified. BCG does not have a genetic genealogy certification.

Lack of BCG certification does not mean that someone is not qualified, and BCG certification certainly does NOT mean or imply that the individual is competent in genetic genealogy, which has more and more become a part of almost every genealogical puzzle. If not for initial discovery, for confirmation.

There are many avenues for genealogical training, including, but not limited to:

  • Brigham Young University Family History Degree
  • NGS Home Study Course
  • Salt Lake Institute of Genealogy (SLIG)
  • Genealogical Research Institute of Pittsburgh (GRIP)
  • Boston University Certificate program
  • Genealogical Institute on Federal Records (Gen-Fed)
  • Institute of Genealogy and Historical Research (IGHR)
  • University of Strathclyde
  • University of Dundee
  • Major Conferences, including RootsTech and NGS, among others
  • Specialty conferences such as the International Conference on Jewish Genealogy (IAJGS)
  • Online conferences and conference proceedings such as Rootstech who maintains a free library of their virtual and recorded conference sessions.
  • Legacy Family Tree Webinars
  • Videos produced by major genealogy companies such as MyHeritage, FamilyTreeDNA and Ancestry, often available through their website, Youtube or both
  • Blogs and learning/help centers of the major genealogy companies

Genetic Genealogy Training

Genetic genealogy training is more challenging because there is no specific program, curriculum, or certification.

Many genetic genealogists obtained their experience as a part of genealogy over 15 or 20 years and have focused on the genetic aspect of genealogy. Several of us had a scientific background that meshed well with this field and is part of why we discovered that our passion is here.

Before I provide this resource list, I need to emphatically state that probably 95% of answers that I see provided on social media platforms in response to questions asked by people are either entirely incorrect, partially incorrect in a way that makes me want to say, “well, not exactly,” or are incomplete in a way that makes a significant difference.

I chose and choose to focus on creating educational tools and making explanations available for everyone, in one place, not one question at a time.

I began publishing my blog in 2012 as an educational tool and I’m dumbstruck by how many people just want a yes or no answer instead of learning. If one doesn’t take the time to learn, they have no idea if the answers they receive are valid, or if there’s more to the story that they are missing.

Social media can mislead you badly if you don’t have the ability to discern between accurate answers, partially accurate answers, and incorrect answers. Furthermore, opinions differ widely on some topics.

Unfortunately, because there is no genetic genealogy credentialling, there is also no “post-nominal letters,” such as CG for certified genealogist. Therefore, a novice has absolutely no idea how to discern between an expert and another overly helpful novice who is unintentionally providing incorrect or partial information.

Many of us who at one time reliably answered questions have simply gotten burned out at the same question being asked over and over, and no longer regularly engage. Burnout is real. Another issue is that askers often don’t provide enough, or accurate, information, so a significant amount of time is spent in clarifying the information around a question. Furthermore, your CPA, lawyer, and physician don’t answer questions online for free, and neither do most people who are busy earning a living in this field.

DNA educational opportunities, some of which are contained within larger conference agendas, include:

There are other blogs, of course, some of which were launched by well-known genetic genealogists but are no longer maintained. Blogging is quite time-consuming.

I’ve covered all kinds of genetic genealogy topics in my blog articles. They are a good source of information, education and hands-on training. I attempt to publish two articles weekly, and there are over 1600 available for your enjoyment.

In addition to the initial learning period, you’ll need to make time to stay engaged and maintain your genealogy and genetic genealogy skills.

Apprenticeship

In addition to training, I think you’d need at least a year interning or working at a junior learning level, minimum. Think of it as your genealogy residency.

  • You could choose to work for a vendor in their help center.
  • You could choose to work for a genealogy company. I’ve mentioned the largest ones, but there are others as well.
  • You could choose to work on your own case studies and those of your friends and family, but if you do, be aware that you won’t have anyone reviewing your work. If you make a mistake or should have approached something differently, and you’re working alone, there’s no one to tell you.
  • You could work as a search angel for others. I have mixed emotions about this, in part due to the lack of review and oversight. But also, in part because “free search angels” perpetuate the idea that genealogy “should be” free.

If you want to work in IGG, after training, an internship under an established mentor is ABSOLUTELY ESSENTIAL for a minimum of 100 or so successful closures.

Genealogists and genetic genealogists have the ethical responsibility to NOT MAKE MISTAKES when working on other people’s family. You need to know what you know, what you don’t know, when to get help, from where and with whom.

Networking Opportunity

A Facebook group named “Genealogy Jobs” has been established to discuss opportunities and all of the topics surrounding this subject.

There’s a Genealogy Career Day event on April 22nd where you can interact with professionals including authors, freelance genealogists, certified genealogists, business owners, and an investigative genetic genealogist. Take a look at the topics. If you’re considering whether or not you want to go pro, you’ll be interested. You can sign up here.

The sessions will be uploaded to their YouTube channel, here, after the event.

I hope you’ve found this article useful and helps you decide if this profession is for you. If so, create a plan and execute.

If you decide you do want to go pro, I wish you the best and welcome you to the fast-paced world of professional genealogy or its specialty, genetic genealogy.

____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

cM Explainer™ – New MyHeritage Relationship Prediction Tool

Posted on by
14

At RootsTech, MyHeritage introduced cM Explainer, a new tool for all of their DNA customers that utilizes both the total matching cMs (centimorgans) plus the ages of the people involved, if provided by the customers, to estimate the relationship possibilities between two matches.

According to the MyHeritage blog article, here:

DNA Matches are characterized by the amount of DNA shared between two individuals, measured using a unit of genetic distance called centimorgans (cM). cM Explainer™ is unique in the way it uses both the centimorgan value as well as the ages of the two individuals (if known) to fine-tune its predictions, making MyHeritage the only major genealogy company to offer relationship prediction at this level of granularity and accuracy.

cM Explainer™ is fully integrated into the MyHeritage platform to shed light on any DNA Match found on MyHeritage, and is also available as a free standalone tool to benefit individuals who have tested with other DNA services.

Using cM Explainer

cM Explainer is automatically implemented for all MyHeritage DNA customers, so there’s nothing to do except utilize the tool in conjunction with the additional DNA tools already provided by MyHeritage.

Just click on DNA Matches if you’re a DNA customer, or under DNA Tools if you want to use the cM Explainer standalone tool.

Let’s look at my matches.

As you can see, two of my matches have provided their ages which appear in their match information.

The new cM Explainer probable relationship is listed as well. In Charlene’s case, she’s predicted to be a half first cousin, and Cheryl is predicted to be either a half first cousin, or a parent’s 1st cousin, which is another way of saying first cousin once removed.

Recall that “once removed” means one side of the descendant tree is one generation longer than the other. Cheryl and my Mom are first cousins (1C) and Cheryl and I are first cousins once removed (1C1R) or, said another way, I’m Cheryl’s first cousin’s daughter.

Probable Relationships

Some matches receive two listed “Probable Relationships,” but everyone can view additional estimates.

Click on the purple “Review DNA Match” button to view detail information.

My match’s segment information is provided, in addition to the possible relationships, in order of most probable first. To see additional information, click on the “show more relationships” link.

Charlene has a total of 5 possible relationships listed, each with its own probability calculated. One of my matches has a total of 8 possible relationships displayed.

Next, you’ll see the diagram of possible relationships.

Don’t forget to click on the “Relationships” dropdown in the upper right corner of the diagram.

You can click on Full relationships, Half relationships, or All Relationships.

I clicked on “all” which displays everything together.

Clicking the “Show probabilities for MRCA” box in the upper left-hand corner adds the probability that you and your match descend from a specific generation, or MRCA (most recent common ancestor.)

The highest or best probable relationship for cousin Charlene is calculated as 51.8% half first cousin.

The other possibilities are less likely. The second most likely is “Parent’s first cousin,” at 24.3%.

Charlene is my first cousin once removed (1C1R,) at the bottom. Stated another way, Charlene is my first cousin’s child, calculated at 4.5%, which should be genetically equivalent to a half first cousin at 51.8%. As you can see in the chart above, there’s VERY large probability difference between those two, which may be because of the expected comparative ages of the people in those positions involved.

Let’s take a minute to look at how half and “removed” relationships work genetically.

Half and “Removed” Relationships

In this example, John was married twice, to Mary and Sue. John had son Jim with Mary, and both daughters, Anna and Bonnie, with Sue. Their descendants took DNA tests.

In this chart, you can see that half-relationships of any kind carry half the average expected shared DNA as the full version of the same relationship. The yellow people, descendants of John and Mary, are half relationships to the green people because John was married to both Mary and Sue, having children with both wives.

The green people descend from full siblings, Anna and Bonnie, the children of Sue.

In the first generation, Jim and Anna are half siblings and share about 25% of their DNA. Anna and Bonnie are full siblings and share about 50% of their DNA. By extension, of course, Jim and Bonnie are half siblings too, sharing approximately 25% of their DNA, but not the exact same DNA as Jim and Anna share.

In the next generation, Jordan and Andrew are half first cousins and share about 6.25% of their DNA, while Andrew and Brad are full first cousins and share about 12.5% of their DNA.

Below the second cousin level, some cousins won’t match each other, but that doesn’t mean they aren’t cousins. It only means they didn’t happen to inherit a common segment of DNA from their common ancestors.

At the fourth-generation level, Jeremy and Abraham are half third cousins and share less than 1% or about 26.56 cM of their DNA, while Abraham and Betty are full third cousins and share about 53.13 cM of their DNA.

That half division of DNA occurred several generations earlier because Jim and Anna are half siblings which means that they only share half as much DNA as full siblings Anna and Bonnie. Of course, each subsequent generation will be a half relationship, and share roughly half as much as the full equivalent of that same relationship.

Once Removed

However, when the generations are offset by one, or once removed (1R,) the DNA is halved again. Looking at the chart again, half third cousins (3C,) Jeremy and Abraham share about 0.39% or about 25.56 cM of their DNA. Abraham and Beverly, who are 3C1R (third cousins once removed) are ALSO expected to share about 25.56 cM, the same amount of their DNA. In this comparison, the halving occurs in the last generation by the generational offset, when comparing Abraham with Beverly.

Of course, Jeremy and Beverly share the smallest percentage of all, because they are Half third cousins once removed, so they would be expected to share only about 13.28 cM of their DNA, assuming they share any at all.

I wrote about the various percentages expected of each relationship level and compiled a comprehensive chart in this article.

Of course, MyHeritage has included the factor of age to attempt to refine the relationship more succinctly.

How Accurate is cM Explainer?

I created a chart of my closest matches who are known, proven relatives.

Results where My Heritage has provided exact, accurate predictions are shown in red.

My first thought when I saw this new tool was that all of the people with whom I shared a Theory of Family Relativity (TOFR), especially relationships I had confirmed (or at least not rejected) would be predicted in cM Explainer to be that same relationship. Well, I was wrong.

Of the 8 matches with whom I have an accurate TOFR, the relationships of 4, or 50%, are correct, but the other 4 are not, so clearly, MyHeritage is not relying on TOFRs for cM Explainer, at least not solely, if at all.

Person Total cM # Segments Actual Relationship TOFR MyHeritage cM Explainer
Michael 822.8 31 1C Y 1C
Alberta 744.2 25 Half niece *1 (2nd on list) Y 1C
Dana 521.8 17 Half 1C1R (not on list) N 1st C dau, half 1C
Charlene 477.5 24 1C1R *2 (4th on list) N Half 1C
Cheryl 477.2 23 Parent’s 1C (2nd on list) N Half 1C, parent’s 1C
David 460.4 17 2C (3rd on list) N Half 1C
Buster 409.9 16 1C1R *3 N Parent’s 1C
Donald 381.7 17 1C1R (3rd on list) N 2C
Kurt 378.9 16 Half great-nephew (not on list) N 2C
Teresa 330.4 13 Half great-nephew (not on list) Y 2C
Shirley 223.3 8 2C1R (2nd on list) Y 2C
Sydney 217.8 10 Half great-nephew (not on list) N 2C dau, 1C dau
Buzz 212.7 9 2C Y 2C
Amos 182.7 8 1C2R (8th on list) N 2C son
Denny 166.9 6 3C (2nd on list) N 2C
Thomas 156.4 7 2C Y 2C
Patty 150.6 9 2C Y 2C
Cathy 102.9 5 3C Y 3C
Carol 87 7 2C1R (2nd on list) N 3C

*1 – Half aunt/uncle is equivalent to half niece/nephew – it’s simply a matter of perspective.

*2 – 1C1R (first cousin once removed) is the same relationship as a first cousin’s child, just said differently.

*3 – Your parent’s first cousin in your first cousin once removed (1C1R.)

In the Actual Relationship column, I’ve indicated the actual relationship, then if the actual relationship is shown on the chart of possibilities provided by MyHeritage, and if so, at which position.

For example, I’ve listed Alberta’s “Actual Relationship” as my half-niece. Additionally, there’s a comment at *1 below the chart. MyHeritage predicted Alberta as my first cousin, but the correct half-niece designation is shown second on the list.

In this case, I’m fairly sure I know exactly why the relationship miscalculation occurred. Alberta’s mother, my half-sister, was born to my father’s first wife. My mother was 22 years younger than my father, so my mother is roughly the same age as my half-sister. I am the same age as my half-sister’s oldest children. Therefore, we have an unusual generational difference where ages might be misleading.

In the second position, MyHeritage estimated Alberta as half-aunt, which is the same as half niece, depending on whose perspective you’re speaking from, so cM Explainer was close. In normal circumstances, 1st Cousin is probably the most likely relationship although having children separated by two decades certainly is not unheard of.

MyHeritage correctly predicted 6 of 19 relationships, for 31.6% accuracy.

The correct relationship was on the relationship list most of the time, but was omitted entirely 4 times. The common factor in the entirely missing relationships is that they are all half-relationships. While they were not all from the same family line, they did all involve long generations, meaning children born over a very long period. That’s not uncommon with half-siblings, and half relationships are notoriously difficult to sort from other candidate relationships. These situations might possibly be considered statistical outliers.

Equivalent Relationships

A half first cousin should be genetically equivalent to a first cousin, once removed, based on the amount of expected DNA for those relationships.

However, in at least one case, these two relationships are calculated with different resulting probabilities. Half first cousin is 41.5%, and 1st cousins child (aka 1C1R or 1st cousin once removed) is 43.8%.

Keep in mind, though that MyHeritage is using the age of the two individuals in their calculations, which could alter the results based on the combination of factors calculated into the probabilities. It’s 85% likely that the match is one of those two relationships.

Your Thoughts?

I’m interested in your thoughts on this new tool. How does it work for you? What about endogamy or pedigree collapse? Do you find it useful? How are you utilizing it in your research?

Shortly, I’ll do a comparison article with other tools to see how the publicly available cM Explainer tool stacks up against the rest.

Thanks to MyHeritage for making this tool free for all to use, here.

_____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

RootsTech 2023 – Truly United

Posted on by
24

Finally, finally, we were on our way, winging our way across the world from near and far – flying and motoring into snowy Salt Lake City for RootsTech. It seemed like we had been preparing forever, and Murphy visited many of us as gremlins trying to keep us away – but we persevered, and Murphy’s ploy just didn’t work.

Grab a cup of your favorite beverage, because you’re going to RootsTech with me!

I started out very early in dense fog which was a precursor to a nightmare at the airport. We didn’t know that yet, and the sun emerged beautifully as we were on our way.

Utah was blanketed with snow a few days before our arrival. We were hoping for no more snow.

The snow cover made for stunningly beautiful photos from the air.

The Kennecott Copper Mine outside Salt Lake City is three miles wide, nearly a mile deep and looked very interesting and beautiful laced with snow. These terraces are actually roughly 500 miles of dirt road. This used to be a mountain that was 8400 feet in elevation.

During the flight, I read about my ancestor, Stephen Hopkins and couldn’t help but think about how shocked he would have been that I flew across the country some 413 years after he was shipwrecked in Bermuda on the way to Jamestown, eventually lived in Jamestown for 4 years, sailed back to England, remarried, then arrived on the Mayflower in Plymouth Colony.

His ships and mine were very, very different.

FamilySearch Library

Some of us arrived early for research or meetings, or both.

FamilySearch took the opportunity presented during the Covid shutdown to remodel and upgrade the facilities significantly. The new library is both beautiful and super-functional.

The workstations now have three monitors.

There’s a lovely new break room with vending machines, tables, and a fridge.

To put things in perspective, the break room is larger than the preserved pioneer cabin that stands beside the library.

I’m struck by the contrast of the small cabin standing beside the FamilySearch library at left, and museum at right, and just a block away from skyscrapers.

Rather than leave and waste valuable research time, we had a picnic lunch in the break room.

I went to Salt Lake City early to visit the FamilySearch Library and attempt to break down a brick wall. I think I might have done that. We will see.

Other researchers did the same thing, and you can view a special GenFriends episode, here, hosted by Cheryl Hudson Passey, where several of us shared our excitement about our research, discoveries and simply gathering together again.

I was very excited to meet my cousin, Audrey Hill, for the first time in person, at the library. We’ve been collaborating for several months on our John Hill (1737-1805) and Catherine Mitchell (1738-1827) line. She’s already following up on a lead I never did (my bad.) Go Audrey!!

I spent two days perusing book after book after book in the Virginia and Maryland counties where my Dobkins and Johnson ancestors were known to have lived, then moved to the historically adjacent counties.

I was incredibly discouraged, but on the evening of the second day, back at my hotel again, I reviewed all of the library resources and noticed that I had missed one book that was shelved elsewhere.

Glory be, I *think* I’ve found him and his family.

My Peter Johnson line’s Y-DNA matches the Jochimsson (Yocum) line, so I have a LOT of work to do. But now at least I know where to dig!

I needed this entire book, not just a few pages.

Fortunately for me, Jim volunteered to scan the entire book at one of the new book-scanning stations.

I’m SOOO excited.

RootsTech and the FamilySearch library ran golf carts back and forth between the facilities throughout the conference.

Decisions, decisions.

Well, if you can’t decide, just go to the chocolate shop to think things over😊

The Night Before

Preconference events began on Wednesday evening with the media dinner which allows us to understand the layout, when to be someplace, and where that place might be. It also allows provides accurate information to pass on to you.

Of course, many of us have known each other for years. As the first event of RootsTech, after three years of being apart, it felt like one huge family reunion with everyone catching up. So many hugs!!!

And selfies.

It was wonderful to see Marie Cappart again. I’ll never forget walking down the street in Amsterdam with two friends and hearing someone shouting my name from some distance away. I turned around and there was Marie, running toward me, arms outstretched. What are the chances??

The influencers and media were treated to a tour of the show floor after setup was supposed to be complete.

Finishing touches were being put on the Expo Hall and booths. I guess I never realized how large these booths are and that they actually have to be “constructed”.

The next morning, the show would open and thousands of excited genealogists would descend on the Salt Palace for the next three days.

RootsTech Opens

Finally, the Salt Palace, with its legendary signs outside, was ready to receive genealogy guests.

Everyone was so happy to see each other again. My friends, Janna Helstein, Schelly Taladay Dardashti and Daniel Horowitz with MyHeritage photobombing the group. This was the best of several photos because we were all joyfully laughing so hard.

The absolute best part of RootsTech 2023 was seeing people again, in person. Zoom and similar platforms have been sanity-saving for the past three years – but they aren’t people.

Humans are, I think, wired for connection to each other.

I’ve worked “home office” for decades now, but not without regular contact with others.

The classes were great and there was a lot that was wonderful at RootsTech – but hands down, the best part was hugging so many people.

In case you aren’t aware, genealogists are huggers.

If someone were to have followed me around taking photos, there would have been hundreds of hugs. And I don’t mean polite greeting distant hugs. I mean the “OMG I haven’t seen you in a lifetime and everyone was concerned we might never see each other again” holding tight, never-letting-go hugs.

Mags Gaulden and I spotted each other in front of the WikiTree booth, and some kind soul took our picture. I tried to do a nice thing for her and made DNA masks, not remembering that she was allergic to my cat assistants. Thank goodness Mags realized it quickly enough to remove the masks before they had the opposite of the intended effect. I really do not want to be listed in her obituary! “Cause of death: Roberta’s masks.”

Tears streamed down people’s faces as they saw each other, especially that first day. And I don’t mean because of cat hair, either.

There were thousands of selfies joyfully taken. Lots of “blooper” ones too, but just the giddiness of being together again was intoxicating and overshadowed the challenges of the past few years. For a minute, or a few, everyone could just forget about everything else and enjoy our three-day adrenaline high.

And of course, sometimes things change, and many people weren’t there, for a variety of reasons. I missed so many people and there was more than one moment of silence.

Attendance

Here’s the RootsTech Expo Hall from the second floor. It felt like “coming home” after a long absence.

I was standing inside when the doors opened on the first day. People were waiting, but not the mob like past years.

In a Zoom call with RootsTech staff a week or ten days before the conference, they said they had 6000 paid admissions at that time, and a week or so later, they said they were anticipating the same number of attendees as 2020 which was about three times that number.

That number was clearly aspirational, but it didn’t happen.

I’ve been attending RootsTech since 2018, and the actual in-person attendance, based on observation, was lower than it has been since I’ve been attending. Of course, while we may be getting used to Covid, it’s not over and still a significant concern to many. I had my doubts.

Now that I’ve said that about attendance, let me expand. There were over a million registered online for the virtual sessions PLUS the livestreamed sessions that were held in person as well. I don’t know how many more than a million attended, but that number will only grow because those sessions remain available for viewing after RootsTech. In other words, Rootstech sessions have become a library which you can find and enjoy, here.

Clearly, more people in total were reached in 2023 than in 2020.

Questions for Attendees

This year, I had three in-person classes, and no virtual classes. All three were well-attended.

I don’t know how many people attended my sessions, but I know I took about 2000 DNAeXplain ribbons that were passed out to attendees at the exit doors of my classes if they wanted them for their RootsTech badges. I brought home maybe 100.

After everything is set up for the session (thank you Jim,) I always chat with the people in my sessions that show up early. There’s no reason not to have a little fun for everyone.

My first session was at 9:30 the first day, right after the conference opened at 9. I was passing out ribbons personally to people who were early and I saw the confused looks. So I demonstrated what to do with the ribbons with my own badge.

Ribbons on badges are a RootsTech staple, and it’s the only conference I’ve ever attended with that tradition. I realized, based on the confused looks, that we had several first-time attendees.

I was so excited to welcome people at the beginning of my first session, back to in-person genealogy, and that feeling was palpable throughout the room and the conference as a whole.

How Many First-Time Attendees?

When my session started, I asked how many people were attending RootsTech for the first time, and I was very surprised to discover that roughly half the room raised their hands.

Half!!!

That’s HUGE. No wonder there were so many confused looks about the ribbons.

My three sessions, in order, were:

  • DNA for Native American Genealogy: 10 Ways to Find Your Native American Ancestors
  • DNA Journey – Follow Your Ancestors Path
  • Big Y for the Win

I mention this because of the next questions I asked.

Who Has Taken a DNA Test for Genealogy?

In the first session, “DNA for Native American Genealogy,” I asked who had taken a DNA test, and more than half raised their hands, but several had not. Frankly, that surprised me given how long DNA testing has been available now. I talked to people afterwards, and the common thread for those who had not seemed to be:

  • They didn’t know which vendor or which DNA test to take for this purpose.
  • They thought the ancestor was too far back in time and they would not have any Native results. In my session, I talked about testing the older generations and your cousins. Also, that you don’t know what you don’t know. I asked how many people would purchase a book if they thought the answer to that question even MIGHT be inside, and every single person raised their hand.

I also pointed people to the Native section on my blog, to my book, DNA for Native American Genealogy, and to my second blog focused entirely on early Native American records, www.nativeheritageproject.com.

In the second class, “DNA Journey – Follow Your Ancestor’s Path,” probably three fourths of the class had taken a DNA test. That session was really fun. I used several case studies to illustrate how different kinds of DNA have broken down brick walls AND showed me exactly, and I mean literally exactly where my ancestors were from. I used Y-DNA, mitochondrial DNA and autosomal to accomplish this. Who among you DOESN’T want to stand where your ancestors stood?

Yep, we all do.

I think it was in the second class that I asked a question about how many people had taken the three different types of tests, and here’s the breakdown:

  • Who has taken a DNA test? – The majority of the room
  • Who has taken an autosomal test – It looked to be the same number of people as above
  • Who has taken (or sponsored) a Y-DNA test – Maybe 10% of the room
  • Who has taken a mitochondrial DNA test – A scattering of people

As genealogists, we need to do more Y-DNA and mitochondrial DNA testing, because we don’t know what we don’t know and may well be missing.

In the third class, “Big Y for the Win,” which included both Y-DNA STR testing and the Big Y-700, comparing and contrasting the tests, how to use them, and why the Big Y provides significant advantages, most of the people had taken some type of DNA test.

The second question I asked in the Big Y class was how many people had taken or sponsored a Big Y test, and significantly more than half had, which is what I would have expected.

However, given the session topic, I was surprised to learn that few had used the new, free, Discover Tools, or the recently released Group Time Tree. Both were developed and created by FamilyTreeDNA to maximize the usefulness of Y-DNA haplogroups, and they are amazing.

How Many People Have Tested?

As part of the information that I gathered during the conference, Ancestry has tested 23 million people and MyHeritage 6.5 million. I don’t have a current number for FamilyTreeDNA or 23andMe, but the last numbers I heard some months ago were 2 and 5 million, respectively.

There are clearly more (and new) people who are interested in genealogy and are still DNA testing candidates – especially Y-DNA and mitochondrial DNA which have separate inheritance paths, providing additional and unique benefits as compared to autosomal tests.

Keynotes

The keynote sessions were livestreamed, so you can still view them here. Be sure to watch Steve Rockwood’s welcome. He may be the CEO, but he’s an exceptionally caring, inspirational and humble, man.

I attended two of three keynote sessions. Each keynote session actually included three speakers, which was initially confusing.

Steve Rockwood’s message is that “All Means All” – everyone is included. He also thanked and encouraged people to not be further divisive during this difficult time, and instead to choose inclusion.

Steve asked several questions and in answer to his queries, attendees were encouraged to hold up their phones with their flashlight on. As you can see, the entire huge room is filled with light – our light. One at a time. We can all be the light. You can hear Steve’s message for yourself, here.

Another session I enjoyed immensely was Jordin Sparks, the youngest ever American Idol winner. I’ve been in concert venues that were smaller, so it was a real treat to enjoy this inspirational story plus four of her amazing songs.

I really encourage you to watch this video, especially if you love music. Even Jordin’s guitarist was wiping his eyes!

She literally played to a packed house and I don’t think there was a dry eye anyplace.

Jordin has an incredible voice and an inspirational story. Do yourself a favor and listen, here.

MyHeritage Keynote and Announcements

Aaron Godfrey, VP of Marketing with MyHeritage announced new products and initiatives during the keynote on day 2.

The new Photo Dater app, available soon, will estimate when a photo was taken based on clothes, hairstyles and other items in the photo.

Additionally, Aaron announced the cM Explainer, a wonderful new tool which predicts relationship estimates between DNA matches and includes the ages of the testers, among other factors. cM Explainer is incorporated into your DNA matches at MyHeritage in addition to being independently available for free, here.

I’ll be reviewing this new feature in an article, soon.

In another surprise, Aaron announced that MyHeritage has donated another 5000 kits to DNA Quest, for adoptees, here.

MyHeritage also introduced color coding for family trees, here. If you’re a MyHeritage user, this feature is already available for you on your tree, so check it out.

MyHeritage takes the “most new announcements at RootsTech” award with these new features.

Vendor Booth Sessions

Truth be told, I didn’t even get to visit all of the various booths. I meant to, but it just didn’t happen.

At least two vendors offered sessions throughout all three days. There were probably others, but between my three RootsTech sessions, three booth sessions and the book signing, in addition to keynotes, meetings and interviews, I just wasn’t able to attend many booth sessions.

The ones I did attend were wonderful. I focused on DNA, of course. Let’s start with FamilyTreeDNA.

Sherman McRae presented “Unexpected Y-DNA Results” in the FamilyTreeDNA booth where he’s showing how to utilize the Y-DNA Time Tree in the Discover tool, and the Group Time Tree.

You can view Sherman’s main session, Connect the Forefathers, here.

You just never know when a pilgrim is going to show up for your session.

Janine Cloud, an enrolled Cherokee tribal member and manager of Group Projects at FamilyTreeDNA discussed Y-DNA, mitochondrial and autosomal avenues to prove Native ancestors using DNA, using her own Cherokee ancestors as an example.

Dr Paul Maier, Population Geneticist, Goran Runfeldt, Head of Research and Michael Sager, Phylogeneticist answer questions about Y-DNA in the AMA (Ask Me Anything) session.

Paul and Goran also hosted an AMA for mitochondrial DNA as well, an often overlooked but valuable resource.

In addition to the Native American AMA session for FamilyTreeDNA which I gave with Janine, I gave two booth presentations for MyHeritage, “Time Travel with Your Ancestors” and “AutoClusters for the Win,” both of which were recorded meaning you  just might see them in the future.

The Time Travel session utilized the MyHeritage AI tools to see what my ancestors who came from specific regions or cultures might have looked like in that time and place. In the slide above the AI photo of my grandmother is combined with the document and with the Genetic Group that incorporates that part of Germany.

I combined the AI images with MyHeritage records that link those ancestors to a specific location, showing the predicted ethnicity, genetic groups when applicable, and then the actual location – some of which I’ve visited. My ancestor owned that windmill in the Netherlands, above. Combining these tools is so much FUN. My heritage provided the AI photos, records and ethnicity. I’m the one who did the traveling, of course, but in this way, time travel is possible!

I really enjoyed using this story-telling methodology that incorporates all 4 types of genealogy research and clues.

In the AutoClusters for the Win session in the MyHeritage booth, I discussed how I utilized AutoClusters to solve an adoption case in my own family, and how you can use this very powerful tool as well. The methodology I used works equally as well for genealogy mysteries.

In another MyHeritage booth presentation, Janna Helshtein told an amazing and moving story about her grandparents, their escape from the Holocaust, move to Israel, and more – in their own “voices” using MyHeritage’s Deep Story.

We all sat spellbound.

Janna also offers a free guide on how she created and integrated the Deep Story verbiage that her grandparents “spoke.” It was actually quite easy.

There was more to Janna’s story, but I don’t want to spoil it for you.

I believe MyHeritage intends to make their booth sessions available through social media.

Here, Janna and I are celebrating with a quick picnic style lunch after her presentation. She truly knocked it out of the park.

Shifting Attendance

I’m sharing my opinion here, and not anything a RootsTech spokesperson told me.

I was surprised that the in-person attendance was down as much as it was, truthfully. I think in-person was down by either half or maybe even two-thirds. Some decline wouldn’t have surprised me, but this much was sobering.

I was also VERY surprised that roughly half of the attendees were new. And that number could have actually been higher. That’s a good thing, meaning new people are being attracted to genealogy.

These two things, together, suggest the following to me:

  • The passing of time, Covid, and aging-out of some people caused some decline. I know several people who passed away during the past three years, not to mention those whose lives changed dramatically due to their partner’s illness, passing or life circumstances. Several people lost jobs or moved, or both, or are in that process now.
  • Now let’s flip this and say that the virtual and FREE capability for much of RootsTech made the conference accessible and available to many who could not attend in person. For that, I’m very grateful. I have a friend who has been very ill and participated by taking selfies of herself with the livestreamed sessions on her monitor behind her. She posted her photos on social media to be with us. That warmed my heart so much.
  • I think that the reason there were so many new people was because they were able to attend virtually during 2021 and 2022. Essentially this means that while virtual RootsTech was challenging for everyone on the behind-the-scenes production side, to put it mildly, it served to recruit many new genealogists who would not have participated in person had they not previously attended online.

Based on discussions at the media dinner table, and other statements by Steve Rockwood, CEO of FamilySearch, FamilySearch, including RootsTech, is reaching out to young people and to other areas of the world as well.

According to Steve, who, by the way, turns out to be my 11th cousin according to Relatives at RootsTech and the FamilySearch Tree, RootsTech will forever be a blended conference event.

This year, in addition to the local emcee, there were 15 people in other countries hosting in their locations, times and in their native languages.

This year there were 304 virtual classes, 205 in person, and some of those were streamed online as well.

Don’t forget that Relatives at RootsTech is still available through March 31st and you can contact cousins to collaborate. Some may represent Y-DNA or mitochondrial DNA testing lines that you need for matching and to complete your tree.

Vendors

That brings me to the topic of vendors.

Three of the four major DNA vendors were present, meaning Ancestry, FamilyTreeDNA and MyHeritage. 23andMe was absent in 2020 and again this year. Their last DNA innovation was their genetic tree in September of 2019.

Many of the smaller vendors were not in attendance. I had made friends with several of the Mom and Pop vendors and almost none of them were there this year, nor were many of the organizations and smaller companies. I spoke with several people and they said, almost universally, that the cost of the virtual booths over the past two years, the work involved, and the fact that those virtual booths did not generate many sales, not even equal to the amount of the booth rent, had soured the experience.

Not only are conference booths very expensive, so is the invested labor and time. For those of you who don’t know, booth rent is only a part of it. You want carpet? That’s more. A chair? That’s more. Two chairs? More. A trash basket? More. Oh, you need wireless to handle sales? LOTS more.

I’d say that the Expo Hall was only half to one third of the size it had been previously. Mind you, it’s still huge, especially compared to many other conferences, but I missed seeing many of my favorite vendors.

For example, neither Genealogical.com nor Deseret Books were there this year, so there was no bookstore, and neither were many of the fun t-shirt vendors or others that sold jewelry or genealogy-related merchandise.

I hope that FamilySearch will put their creative caps on and perhaps reach out to their vendors, both past and current, and figure out a way to make RootsTech vendors attractive to the online crowd. Perhaps a “search” game where you have to visit vendor booths to find items. Maybe there could be some permanent online stores as well.

There were fewer food vendors too, but in case anyone was wondering, I could still smell cinnamon-almonds throughout the facility😊

I did run into some of my long-time vendor friends.

My friend Jessica Taylor with Legacy Tree Genealogists. I regularly refer people seeking genealogists who understand both genealogy and DNA to Legacy Tree Genealogists.

I don’t need to tell you how much I love DNAPainter and it was great to see Jonny Perl and Patricia Coleman in the DNAPainter booth.

I feel kind of bad because I obviously caught Rob Warthen and Carol Carman by surprise in the East Coast Genetic Genealogy Conference booth, but it’s the only photo I have of their booth.

Last fall’s ECGGC conference was very successful and I’m planning to speak in person this year, in Baltimore, October 6-8, 2023. Save the date. Last year was the first year and it was wonderful.

My Book Signing

FamilyTreeDNA was kind enough to host my book signing for DNA for Native American Genealogy in conjunction with the Native American Ask Me Anything session. Many thanks to Joe Brickey for her help with this event as well.

After the AMA session, which was the final event of Saturday, just before closing, we took a group picture with the FamilyTreeDNA team, or at least the staff members in the booth at that time.

I did learn that perhaps the last thing Saturday might not be the best time for a book signing, because lots of people leave on Friday night. On the other hand, on Saturday, admission to the conference is free, at least to the show floor, with lots of children’s activities and programs for LDS families. Saturday is always very busy in terms of traffic, with sometimes more Saturday visitors than paying conference attendees. It will be interesting to see final RootsTech conference numbers.

The Thank You That Made My Day!!!

One lovely lady, Charis, came up to me after my first session and explained that she saw an ad for RootsTech. She decided she needed to purchase a ticket and attend. She had never heard of me, but she is very focused on documenting her Native ancestry. She sat in the front row in my first session and paid rapt attention. (Speakers do notice, in case you wondered.)

Charis came up to me afterwards and told me that this class alone was worth her registration fee.

She made my day, but I thought to myself that she would attend other sessions that she would find equally as valuable. After all, the conference was just beginning. She found me the next day and repeated what she had said. On day 3, she attended the Ask Me Anything session, arriving early. She said the said the same thing, AGAIN, and I asked if we could take a picture together. As presenters, we take our time, spend our money to attend these conferences, and invest the effort because we want to help people.

People like Charis make this all worthwhile.

Sweetness Personified

I’m sorry, I just can’t resist sharing the sweetest picture series ever.

In 2020, I met my cousin, Heidi Campbell and her baby at RootsTech. Three years later, I saw Heidi again, with a beautiful new addition to the family.

I just can’t tell you how wonderful it was to hold this baby. The last baby I held was Heidi’s little one, three years ago. The look on Heidi’s face is priceless too when he’s reaching for my glasses. He had the biggest smile EVER on his face and he’s booping noses with me. We had so much fun.

My heart just melted into a huge puddle. I so much wish they lived close so I could “grandma.” Thank you, Heidi, for sharing your sunshine with me.

Rolling Up the Sidewalks

On Saturday, literally at one minute after 3 when the conference closed, the workers at the Salt Palace started rolling up the sidewalks, or in this case, the carpets.

It’s a wrap!!!

Afterglow

At the Salt Lake City airport, I ran into two people and had the opportunity to talk to them again and hug goodbye once more. You’d think we would all have had enough of genealogy, but not a chance. More hugs, gratitude for togetherness, and anticipation for next year.

Winging my way home again, having walked about 6 miles each day, according to Fitbit, I was tired, desperately tired, and my everything hurt. However, I was also incredibly fulfilled to have connected again with old friends and met so many new people that I now look forward to seeing again. We are very fortunate to be members of such a wonderful, diverse and universal community.

I couldn’t help but think, as we crossed the winding Mississippi River, how fortunate we are that we have “time travel” in this way. I’m also struck with how many different ways we have to time travel, with Y-DNA and mitochondrial DNA at FamilyTreeDNA, autosomal testing and ethnicity at various vendors, and actual historical records that are becoming ever-more available remotely.

Using artificial intelligence, we can “see” our ancestor’s heritage in our own faces, or, in this case, the face of my grandfather using the MyHeritage AI Time Machine.

Using our DNA, we can identify the parts of those ancestors that we carry today, reaching back in time several generations with autosomal DNA. In addition to autosomal, both Y-DNA and mitochondrial DNA provide close matches and reach back in time, focused on one specific line, providing insights for millennia.

Time travel, truly reimagined.

There are so many ways to discover and connect with our ancestors available to us today. If we don’t carry the DNA of ancestors a few generations upstream, perhaps selected cousins do. We have several tools and databases at our disposal to find testers.

The DNA of our ancestors can and does actually lead us home, to them and, sometimes, exactly where they lived, as I illustrated with several case studies in my presentation, “Follow Your Ancestors Path.” Today, these options are available to everyone.

RootsTech is in the history books for another year, with new friendships made and old ones renewed. Indeed, we were finally reunited with each other, and introduced to cousins we had never met before. We shared tools, methodologies and information to identify our ancestors. We all left fervently hoping to be reunited again next year.

Please enjoy the amazing RootsTech musical finale here.

_____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

The Best of 2022

Posted on by
12

It’s that time of year where we look both backward and forward.

Thank you for your continued readership! Another year under our belts!

I always find it interesting to review the articles you found most interesting this past year.

In total, I published 97 articles in 2022, of which 56 were directly instructional about genetic genealogy. I say “directly instructional,” because, as you know, the 52 Ancestors series of articles are instructional too, but told through the lives of my ancestors. That leaves 41 articles that were either 52 Ancestors articles, or general in nature.

It has been quite a year.

2022 Highlights

In a way, writing these articles serves as a journal for the genetic genealogy community. I never realized that until I began scanning titles a year at a time.

Highlights of 2022 include:

Which articles were your favorites that were published in 2022, and why?

Your Favorites

Often, the topics I select for articles are directly related to your comments, questions and suggestions, especially if I haven’t covered the topic previously, or it needs to be featured again. Things change in this industry, often. That’s a good thing!

However, some articles become forever favorites. Current articles don’t have enough time to amass the number of views accumulated over years for articles published earlier, so recently published articles are often NOT found in the all-time favorites list.

Based on views, what are my readers’ favorites and what do they find most useful?

In the chart below, the 2022 ranking is not just the ranking of articles published in 2022, but the ranking of all articles based on 2022 views alone. Not surprisingly, six of the 15 favorite 2022 articles were published in 2022.

The All-Time Ranking is the ranking for those 2022 favorites IF they fell within the top 15 in the forever ranking, over the entire decade+ that this blog has existed.

Drum roll please!!!

Article Title Publication Date 2022 Ranking All-Time Ranking
Concepts – Calculating Ethnicity Percentages January 2017 1 2
Proving Native American Ancestry Using DNA December 2012 2 1
Ancestral DNA Percentages – How Much of Them in in You? June 2017 3 5
AutoKinship at GEDmatch by Genetic Affairs February 2022 4
442 Ancient Viking Skeletons Hold DNA Surprises – Does Your Y or Mitochondrial DNA Match? Daily Updates Here September 2020 5
The Origins of Zana of Abkhazia July 2021 6
Full or Half Siblings April 2019 7 15
Ancestry Rearranged the Furniture January 2022 8
DNA from 459 Ancient British Isles Burials Reveals Relationships – Does Yours Match? February 2022 9
DNA Inherited from Grandparents and Great-Grandparents January 2020 10
Ancestry Only Shows Shared Matches of 20 cM and Greater – What That Means & Why It Matters May 2022 11
How Much Indian Do I Have in Me??? June 2015 12 8
Top Ten RootsTech 2022 DNA Sessions + All DNA Session Links March 2022 13
FamilyTreeDNA DISCOVER Launches – Including Y DNA Haplogroup Ages June 2022 14
Ancient Ireland’s Y and Mitochondrial DNA – Do You Match??? November 2020 15

2023 Suggestions

I have a few articles already in the works for 2023, including some surprises. I’ll unveil one very soon.

We will be starting out with:

  • Information about RootsTech where I’ll be giving at least 7 presentations, in person, and probably doing a book signing too. Yes, I know, 7 sessions – what was I thinking? I’ve just missed everyone so very much.
  • An article about how accurately Ancestry’s ThruLines predicts Potential Ancestors and a few ways to prove, or disprove, accuracy.
  • The continuation of the “In Search Of” series.

As always, I’m open for 2023 suggestions.

In the comments, let me know what topics you’d like to see.

_____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research

Chromosomes and Genealogy

Posted on by
1

Sometimes people ask about how chromosomes relate to genealogy. Every single one of us started with that question, right?

Are chromosomes different sizes, and does that matter? What are the mystery terms, cMs and SNPs? How does all of this intersect with genealogy? Do I care?

These are all great questions, and of course, there are different ways to answer. Let’s start with some basics.

Chromosomes 1-22

First, you have two copies of each of chromosomes 1-22.

The karyogram above, a photo taken through a microscope, courtesy of the National Human Genome Research Institute, shows the chromosomes of a human male. I’ve added the numbering and labeled the X and Y chromosomes (23).

You inherit one copy of each chromosome from each of your parents. You can see the two halves of each chromosome, above. One half of each chromosome is contributed by the person’s mother, and the other half is contributed by the father.

That’s why DNA matching works, and each match can be designated as “maternal” or “paternal,” depending on how your match is related to you.

Each match will be related either maternally, paternally, or sometimes, both. Of course, that’s presuming the matches are identical by descent, and not identical by chance, but that’s a different discussion. For this article, we’re referencing valid matches with whom you share common ancestors – whether you know who they are or not.

Your 23rd chromosome is different than chromosomes 1-22.

Chromosome 23 Determines a Child’s Sex

Your 23rd chromosome is your sex-determination chromosome and is inherited differently.

You still inherit one copy of chromosome 23 from each parent.

  • Males inherit a Y chromosome from their father, which is what makes males male.
  • Males inherit an X chromosome from their mother.
  • Females inherit an X chromosome from both parents, which makes them female.
Chromosome 23 Father Contributes Mother Contributes
Male Child Y chromosome X chromosome
Female Child X chromosome X chromosome

Because males don’t inherit an X chromosome from their father, X chromosome matching for genealogy has a unique and specific pattern of descent which allows testers to immediately eliminate some potential common ancestors.

The Y chromosome can be tested separately for males and follows the direct paternal line. You can read about the 4 Kinds of DNA for Genetic Genealogy, here.

The X chromosome is quite useful for genealogy due to its unique inheritance path and is included by both FamilyTreeDNA and 23andMe in matching.

Picture This

Three of the four major vendors, plus GEDmatch, provide a visual match depiction of your chromosomes using a chromosome browser:

Unfortunately, Ancestry does not provide a chromosome browser or segment location information.

Using your chromosomes as the canvas, matches to your father and mother are shown using the chromosome browser at FamilyTreeDNA, below.

You can see that a tester matches both parents on the entire covered region of all of their chromosomes. The beginning and the end tips of each chromosome sometimes aren’t covered, and neither are some other regions that are very SNP-location-poor. Omitted regions are shown by hashes. Regions that are light grey, but not hashed, are covered, but the match’s test didn’t produce results in that region.

This is why you may have a slightly different size match with one parent versus the other, especially if they both didn’t test at the same vendor at the same time.

The chromosome browser graphic visually answers the chromosome size question, but there’s more to this answer. It’s easy to see that there’s a significant difference in the physical chromosome size, but there’s more to the story.

SNPs – Chromosome Street Addresses

SNPs, known as Single Nucleotide Polymorphisms, are mutations recorded at specific addresses on chromosomes. Each chromosome holds a specific number of addresses that are read during sequencing and used for match comparison.

All of your other matches that are not parent-child and not your identical twin will match on some subset of these locations.

The Rest of the Answer – Centimorgans and SNPs

Centimorgans (cMs) are units of recombination used to measure genetic distance. You can read a scientific definition here.

For our conceptual purposes, think of centimorgans as lines on a football field. They represent distance on the chromosome.

SNPs are locations that are compared between two people to see if a match occurs.

Think of SNPs as addresses for blades of grass on that football field where an expected value occurs. If values at that address are different, then they don’t match. If values are the same, then they do match. For autosomal DNA matching, we look for long runs of SNPs that match between two people to confirm a common ancestor.

Think of SNPs as blades of grass growing between the lines on the football field. In some areas, especially in my yard, there will be many fewer blades of grass between those lines than there would be on either a well-maintained football field, or maybe a manicured golf course. You can think of the lighter green bands as sparse growth and the darker green bands as dense growth.

If the distance between 2 lines on the football field is 8 cM, for example, and there are 700 blades of grass growing there, you’ll be a match to another person if (almost) all of your blades of grass between those 2 lines match, assuming the match threshold is minimally 8 cM and 700 SNPs.

For purposes of autosomal DNA, the combination of centimorgans (distance,) and the number of SNPs (locations) within that distance measurement determines if someone is considered a match to you. In other words, you’re listed as a match if the shared DNA is over the minimum or selected thresholds. Think of track and field hurdles. To get to the end (a match), you have to get over all of the hurdles!

For example, a threshold of 8 cM and 700 SNPs means that anyone who matches you equal to or greater than both of these cumulative thresholds will be displayed as a match. Centimorgans and SNPs work in tandem to ensure valid matches.

A Second Yardstick

So, the second measure of chromosome size is the number of cMs from the beginning to the end of the chromosome, and the number of SNPs on that chromosome.

Different vendors, and different DNA testing chips cover slightly different regions. This is my match with my mother, which shows:

  • Total matching cMs on each chromosome
  • Total matching SNPs on each chromosome
  • SNP Density, which is a calculation (cM/SNPs) showing how “thick” the SNP grass is on each chromosome

The higher the matching number of cMs, especially in a row (longest segment,) the higher quality the match, and the closer the relationship.

Note that endogamous, or intermarried populations, may need separate interpretations. I discussed the signs of endogamy in this article.

Calculating Matches

Some vendors provide the ability to select your match cM and SNP thresholds, and others make those selections for you. Most vendors no longer display the number of matching SNPs, given that SNP-poor regions are, for the most part, automatically eliminated, although you can view them in your matching segment download file. In other words, the vendors simply take care of this for you. The accepted rule of thumb has always been that 500 (some said 700) or fewer SNPs was too small to be genealogically relevant, regardless of the cM match size.

Vendors include numerous and varying factors in determining match quality and potential relationships, including:

  • Total shared DNA, meaning total matching cM
  • Longest shared, meaning contiguously matching DNA block
  • X matching
  • Sex of tester (especially with respect to X matching)
  • Endogamy flags
  • Half versus fully identical DNA regions (to positively identify relationships such as half vs full siblings)
  • Triangulated segments
  • Family Matching (maternal and paternal bucketing) at FamilyTreeDNA
  • Tree matching

Not all vendors include all factors, and each vendor utilizes proprietary algorithms for features like triangulation.

The question isn’t chromosome size or even match size alone, but the quality of the match plus additive genealogical features like Theories of Family Relativity at MyHeritage to identify common and even previously unknown ancestors.

Be sure to test at the primary vendors or upload for free to MyHeritage, FamilyTreeDNA and GEDmatch to receive as many matches as possible. You just never know where that match you really need is hiding!

Enjoy!

_____________________________________________________________

Follow DNAexplain on Facebook, here or follow me on Twitter, here.

Share the Love!

You’re always welcome to forward articles or links to friends and share on social media.

If you haven’t already subscribed (it’s free,) you can receive an email whenever I publish by clicking the “follow” button on the main blog page, here.

You Can Help Keep This Blog Free

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 Uploads

Genealogy Products and Services

My Book

Genealogy Books

Genealogy Research