This is Part 2 in the series, “The Autosomal Me.” Part 1 was “The Autosomal Me – UnRaveling Minority Admixture.”
Every Sunday, I write something called a Sunday Story. I’ve done this for years. I send them to my kids and I delude myself into thinking they read them. I’m really writing them for my grandkids someday and hopefully, some as yet unborn descendants I’ll have that will care about finding out about the life and times of their a-few-greats grandmother who lived along with the dinosaurs in the last half of the 1900s and first half of the 2000s. I know, I’m optimistic.
I decided that perhaps I would share this weeks Sunday story with all of you. This way, I know that at least someone will read it. Actually, aside from my husband, it’s my daughter-in-law who comments the most often. So welcome to my Sunday Story! You are all honorary cousins!
I know that a great deal of what I do with genetics is lost on my friends and family members. That’s OK, because it’s very specialized. However, I wanted to take a little bit of time to share with you an aspect of the genetics I work with that I think is very beautiful in both a literal and a spiritual way.
The point of genetic genealogy, of course, is to learn about our ancestors, who they were and our connection to them. There are various ways to do this, but most of the time it’s through various matches to other people who share a common ancestor either recently or perhaps further back in time.
Of course, therein lies the rub – how long ago are two people related and who was their common ancestor? Some people who carry minority ancestry are at a distinct disadvantage, because the testing that provides matches and ethnicity generally relies on amounts in excess of 1%, which equates to about 6 or 7 generations. While many of us know that we carry minority ancestry, we would be hard pressed to say that our “pure” Native (or other minority) ancestor fell into that 6 or 7 generation bracket. Six or 7 generations equates to about 150-175 years before our birth, or about 1775-1800 for most of us. By then, many Native people were already admixed and many already lived outside of a traditional tribal unit. Some people carry Native heritage from multiple lines, but since it comes from multiple ancestors, it too is often quite fragmented, so it doesn’t really improve the situation much unless some of those fragments happen to fall together to make larger segments.
Therefore, we are looking for very small amounts of admixture that often don’t show on traditional tests, or if they do, it’s in miniscule amounts.
Enter chromosome painting.
Without going in to boring detail, I’ve recently been working with a new methodology of identifying these fragmented and very small segments. I am using several chromosome painting tools. I’ll be blogging soon enough about how all of this is done, but I just wanted to share with you a couple of beautiful pieces of DNA, through which our ancestors are speaking, and we can see them, in a manner of speaking.
On the graph below, which is my chromosome painting of one a small part of one of my chromosomes on the top, and my mother’s showing the exact same segment on the bottom, the various types of ethnicity are colored, or painted. You can see that both of us have a primary ethnicity of North European, shown by the teal.
The grid shows location 120 on the chromosome. Think of this number as a house number on a street. It’s numbered so we can keep track of where we are on the chromosome. For genealogy purposes, the smallest segment normally considered as relevant is 7 mb or marker segments long. Each tick mark equals one segment or address, so a segment 7 mb long would be from 120-127 which takes you right over to the legend. As you can see, the primary ethnicity has no problem reaching way beyond the contiguous 7 threshold, but the minority ethnicity would not be counted because it’s too small.
However, by the very definition of what minority ancestry is, these small segments are not only present, providing critical information, they are essential in our search and very informative. Let’s see what they are saying to us.
First, let’s talk for a minute about ancestry. There is no line in the sand very often between populations. There are generally only degrees of difference. So in the case of Native American, which is yellow on this chart, we also expect to see it “drift back in time” by being found in conjunction with Siberian (putty), South Asian (red) and East Asian (emerald green). Native Americans were not dropped from alien spaceships, they evolved over time from these other Asian populations, so we would expect to see some of their genetics in Native American people.
So let’s take a look at what we do actually see in the DNA.
The first brightly colored segment in the top band is mine. It includes Native American (yellow), South Asian (red), a big chunk of East Asian (emerald Green), a little bit from the Caucus (ginger) which is the Middle East area, and a piece of West African (light green).
There are two messages from the ancestors in this piece of DNA. First, this segment absolutely, positively does NOT come from mother. We can see this clearly because she has nothing but North European (teal) in that section of her DNA. So, this little gem came from Dad.
The second piece of information is that the ancestor who provided this DNA to Dad was very likely admixed, Native and African.
Of course, if you’re thinking ahead at this point, you’ll be asking, “Which one of your Dad’s other relatives has this same segment?” because, yes, that’s exactly how we will tell which of his lines contributed the Native ancestry. But you’re getting ahead of the story, and well, that is a story for another time. This story today, is about the direct messages of the ancestors and the beauty of our DNA itself.
Let’s look at the next segment of minority DNA. It starts about location 123. Mom’s is much more pronounced than mine and much richer. This tells us that I didn’t receive much of Mom’s. Instead I received mostly North European (teal), along with some East Asian (emerald).
Mom has almost a perfect Native segment here. By perfect, I mean we find a progression from Native back through time through all 4 categories I would expect to find. I consider this entire segment “Native” because it indicates Native heritage. You can see the emerald green (East Asian), putty (Siberian), red (South Asian) and yellow (North American Indian and Arctic) nestled together with no other minority ancestry in close proximity. This means it’s not part of a different kind of Asian segment. Remember, part of Europe was settled by the Mongol Hordes and the Huns, so we do see Asian and western Asian DNA in Europe, along with DNA from the Caucus, but we don’t see isolated segments like this, with just eastern Asian DNA and Native American. So this little beauty is the perfect Native indicator, positively, even though it is only about 4 segments long.
Now take a look at my DNA in that same region in the top row. It’s kind of hard to see the emerald green against the teal, but I only inherited the East Asian (emerald) segments from Mom. Of note, however, is that I also have an East Asian (green) segment that Mom doesn’t have. My East Asian starts about 122 where hers doesn’t begin until 123. So good old Dad contributed a bit here as well. Again, we know this because Mom only has North European at that segment.
And now of course for the kicker. Your DNA looks this same way. How boringly teal it is, or how beautifully rainbow multi-colored depends on how much minority ancestry you have, from how many different lines, and which of your parents you received it from.
I hope you can see why I’m so excited to be developing this new technique to work with highly fragmented DNA to find our ancestors. They are there, they have a voice, and they are speaking to us. All we have to do is figure out how to listen.
I am simply in awe of the beauty of this technique, literally as well as figuratively. While I certainly understand and appreciate logically that matching other people means we’re related, there is something awe-inspiring and tangible about being able to see the painted graphs and view the layers of ancestry nestled together, life forces reaching through time, protecting that DNA with its precious message for us over many generations. All this time, just waiting for us to be able to understand the most personal message from our ancestors, delivered, from them, in our genes, to each of us. This is the voice of our ancestors.
I receive a small contribution when you click on some of the links to vendors in my articles. This does NOT increase the price you pay but helps me to keep the lights on and this informational blog free for everyone. Please click on the links in the articles or to the vendors below if you are purchasing products or DNA testing.
Thank you so much.
DNA Purchases and Free Transfers
- Family Tree DNA
- MyHeritage DNA only
- MyHeritage DNA plus Health
- MyHeritage FREE DNA file upload
- 23andMe Ancestry
- 23andMe Ancestry Plus Health
- Legacy Tree Genealogists for genealogy research
It’s not wasted if we enjoy it and I for one do enjoy what you have to say. I read or did read a lot of Stephen Jay Gould stuff. I couldn’t always understand what he had to say either but I did appreciate it. Keep up the good work. Larry D. Duke, Estes Trails 700 W South Park Blvd Broken Arrow, OK 74011
Thank You Roberta.
This gives me hope.
Great column. I find the chromosome painting really interesting but hard to understand all of it. You explained it really well.
Thanks. I’m colored blind.
You know Patrick, I really feel for you. One of the people I worked with on this was colorblind also and there is just nothing to do about this. Some of the charts aren’t as difficult as this one.
Wow, Thanks to your explanation I think I actually understand that. Than YOU Roberta
This is one of those times I really miss my parents. I would love to be able to do this.
I hear that. You can do some similar things if you have aunts and uncles, or great0aunts and uncles, and sometimes even with cousins, but the ideal situationw ould have having both parents and all 4 grandparents – and I don’t know any genealogist who has been that fortunate.
Great read! I am one who has Native American ancestry within the last 6-7 generations and possibly multiple tribes as well. Still researching !!!
This is excellent. You have not only clearly explained things and excited me with the possibilities.
I’m a grandparent who can test his son, his grandson (and others as necessary/appropriate). What test(s) with which company(s) would let me do the kind of analysis you have done?
Great question. My next article in the series shows you exactly that. I include the results from all of the companies and tell you which ones to use and which ones to avoid. So hold tight for just a few days!!!
Awwww. OK 🙂
Thanks Roberta. Such a moving piece and to hear those voices! Too cool. Everyone seems to really like the new Ancestry Composition at 23 and Me. Interestingly, I show 1% West African. Hope I get to have that conversation one of these days. Thanks
Where can we find this chromosome painting tool? Is it for public use? I would like to compare my mternal uncle’s dna and mine.
Hold tight. This is part two of a series. More parts to follow and it illustrates several tools.
This does not penetrate my brain through reading. I must find another way.
Pingback: The Autosomal Me – Who Am I? | DNAeXplained – Genetic Genealogy
Pingback: The Autosomal Me – Who Am I??? | Native Heritage Project
Great., and I just “East Asian Physical Traits Linked to 35,000 Year-Old Mutation” about the gene known as EDAR by Nicholas Wade, if I could just figure them both out!
Pingback: The Autosomal Me – Testing Company Results | DNAeXplained – Genetic Genealogy
Pingback: The Autosomal Me – Rooting Around in the Weeds Using Third Party Tools | DNAeXplained – Genetic Genealogy
This is a beautifully written blog. I was unfamiliar with chromosome painting, so the example you offered with very helpful. I particularly love the last paragraph of this blog! I’m looking forward to reading the last 3 parts in this series.
Pingback: The Autosomal Me – DNA Analysis – Splitting Up | DNAeXplained – Genetic Genealogy
Pingback: The Autosomal Me – Start, Stop, Go – Identifying Native Chromosome Segments | DNAeXplained - Genetic Genealogy
Pingback: The Autosomal Me – Extracting Data Segments and Clustering | DNAeXplained – Genetic Genealogy
Could you please explain how the same location(s) in the graph can show multiple ethnicities? How can the same location reveal East Asian, Siberian, South Asian AND North American Indian / Arctic?
Pingback: The Autosomal Me – The Holy Grail – Identifying Native Genealogy Lines | DNAeXplained – Genetic Genealogy
Pingback: The Autosomal Me – Summary and PDF File | DNAeXplained – Genetic Genealogy
Pingback: Determining Ethnicity Percentages | DNAeXplained – Genetic Genealogy
Newbie here! Enjoyed reading all your segments while trying to educate myself about DNA. Your writing has a simple quality which this newbie desperately needs. Perhaps if I reread and reread again it will begin to sink in. THANKS for all your endeavors!
Pingback: DNAeXplain Archives – Intermediate DNA Articles | DNAeXplained – Genetic Genealogy
My grandma’s segment on Chromosome 1 was labelled as Native American by 23andMe. I was reading and you said that Southwest Asian and Caucasus might mean it came from a different kind of Asian. She has a small amount of both of them that is nestled into the big yellow segment. It looks like the segment is mixed. It is a very big amount of yellow (North Amerindian+Arctic) and it is nestled in light green (Mediterannean) and teal (Northern European). I am mostly Northern European. Does this mean that her segment is not from a Native American ancestor? Maybe it means the person was likely admixed? I’m just a little confused. Thank you for all you do. 🙂
It could mean admixture. It’s impossible to know. It would perhaps be enlightening to know which parent that segment was from and look at who else from that side of your family that segment matches to see what you can discern about the genealogy of the segment.
I know that it is from her father, but it wouldn’t be an option to test him (He passed away in 1980). I phased her 23andMe kit with my great-grandmother. I think my best bet is to talk to her cousin. They share the same amount of Native American, but I’m not which chromosome. They’re related through the paternal side. The generation tool on 23andMe says that the admixture would have occurred 6 to 8 generations back (1680 to 1770). That’s where I’ll start searching for a paper trail. 😁
Hi, Roberta. I commented a while ago and since then I’ve been doing some tinkering with the chromosome painting. My grandmother had the segment labeled as Native American on Chromosome 1. I figured I would compare hers and mine. I did not receive any of the Amerindian from that particular segment. I did, however, receive some from her on Chromosome 7 and 15. Do you think that this would be enough to assume we may possibly have Native ancestry? I really appreciate all of your work. Thank you for taking time to do this.
In part, it depends on how big the segments are and how pronounced. I’ve also seen German and Slavic people with small amounts, no doubt resulting from early Asian ancestry.
Thank you! I have Eastern European ancestry from my grandfather. My grandmother is of Colonial ancestry. I’ve traced back to the 1600s so far. I am definitely going to keep searching. She is from the Southeastern US and everyone has that “Cherokee great-grandmother” story so I’m a little hesitant to say that we have Native ancestry from that particular segment.
I did the painted comparison using mine and my mother’s kits. And it’s amazing, chromossome 5 is, as you put it, a rainbow. Jesus! I mean, from 1-17 my mom’s is all green with strips of some other color that I don’t identify, which, according to the results of FTDNA, I believe (because the colors repeat with different populations) are North Caucasian and North African, with really tiny little spots of yellow, red and pink, whereas mine is green, and yellow, and red, and lots of other colors. When we get to length 85-117 both mine and my mothers’ chromossome explode in a wide viriety of colors, red (representing Amerindians). gray (for Iberian) and yellow (for Near East) being the longest ones to me. I wish I could post it here, it’s amazing!
I tried to compare the NA to the Asian and Siberian, but I don’t know if they are intertwined there.
Anyways, loved the story 😉
I love your blog! Which test from Gedmatch did you use? My background (supposedly) are genetically similar to yours (European with traces of Native American and possibly African descent) , and Gedmatch has tons of reports more sensitive to one background than another. Pardon me if you go over this in a future blog. I’m reading these in order. 😀
For Native I prefer Dodecad World9, MDLP22, Eurogenes 36.