This is especially useful if you are having difficulty finding people to test. Third, enter the results into Sorenson at and also into for Y-line results to see if you come up with any other people who also match with that surname. Hopefully the person with the other surname can also find someone else from his line to test.
In Tom’s case, he already has his 3 cousins, so his line is proven back to the common ancestor of those men. I call them undocumented adoptions because everyone knows what that means, and regardless of how it happened, it’s “undocumented” because we didn’t know about it. If not, then you know you have a non-paternal event (NPE) of some type, otherwise known as an undocumented adoption. If they do match, then you know you have the lines proven back to 1647. In other words, if you’re testing the Abraham Estes line, you would want to find another son from Abraham to test to see if the DNA of the two sons match. Second, find a second person to test from each line, as far back as possible.
If they continue to match at 111 markers, exactly, you probably have a very close match genealogically.
#MY DNA MATCHES HAVE DIFFERENT SURNAME UPGRADE#
I always tell people to do four things.įirst, upgrade the people you have to 111 markers. This isn’t as unusual as you would think. I have seen at least one instance where 2 men matched at 37 and then had 5 or 6 mutations at the 67/111 marker level. I would suggest that these men upgrade to 111 markers and see how closely they match at that level. However, it is possible to match on many markers, and then not on others. These men share a common ancestor at some point. Is it possible to have an identical match as a random event? So let’s answer the questions that Tom asked. I can’t tell you how many people obsess over these numbers and think that these numbers are telling them exactly when they share a common ancestor. Again, word of caution, these are averages, which is why you have a range shown here. I did an earlier blog about this.Ĭomparing two exact 37 marker matches, below, we see that, statistically speaking, on the average, these two people are most likely to share a common ancestor about the second generation, meaning grandparents. This is called the time to the most recent common ancestor, or MRCA. The TIP calculator, available for every match by clicking on the little orange TIP button, tells us, statistically, how likely people are to match at which generational level. Keep that in mind during the rest of this discussion.įamily Tree DNA gives us some tools to work with these kinds of situations. You can see that the mutation rate can vary quite a bit, even within families. We use statistics to look at the “most likely” scenario, based on averages, but mutations are personal events and while they, as a whole, fall nicely into statistical models, individually, they happen when they happen. I only mention this to illustrate that mutations are truly random events. One of those sons’ lines has 4 mutations in 8 generations, and one line has none. We reconstructed Abraham’s DNA using triangulation, so we know what his original genetic “signature” looked like. We had DNA from the descendants of all 8 sons. In the Estes line, Abraham Estes, one of two Estes immigrants to colonial America was born in 1647. But to the person who doesn’t have any matches, it surely doesn’t seem like there’s a positive side to the situation.įirst of all, remember that mutations can happen at any time in any generation….or not. In a way, it’s a blessing as compared to people who have so many matches that they can’t even begin to sort through them. When I do DNA Reports for people, I still find people who don’t have any matches. Let’s look at Tom’s situation from different perspectives and see what we can find. Is it possible to have an identical match as a random event? How common are such occurrences? What possible explanations could there be?” But the individual has a different surname. Apparently the individual has had very few close matches and never a perfect match like my cousin’s. The first set of 67 results have recently been posted and within a day an exact match appeared with an individual who had only tested to 37 markers back in 2008. “I started up a Y-DNA surname project and recruited my only three living male 1st cousins who carry that name. One of our blog followers, Tom, encountered the following situation, which, really isn’t so uncommon.
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