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    Frank Sperling
    Ancestry Ethnicity vs. Gedmatch Ethnicity
    Question posted February 1, 2014 by Frank SperlingLevel 4, tagged AncestryDNA, DNA, DNA Results 
    768 Views, 5 Comments
    Title:
    Ancestry Ethnicity vs. Gedmatch Ethnicity
    Summary:
    Ancestry Ethnicity doesn't seem to match Gedmatch Admixture
    Content:

    Can someone help me reconcile my data?

     

    In Ancestry, my ethnicity indicates 100% Jewish European.  On Getmatch, my admixture (Jtest) indicates 35% Askenazi, 21% East_Med, 10% East_Med, and the rest a mixture of lower percentages.

    While there is some similarity between the two results (Ashkenazi), there also appears to be some contradictions.  Am I reading the two correctly?  Can anyone provide further info/insight into how to interpret?  Thanks.

    Comments Are Closed

     

    • Erich Snoke

      I would say it appears to be in order.  I will admit that I'm not an expert.  The different DNA test sites seem to have their own definitions of areas, and of course they test differently.  Ancestry uses saliva and FTDNA uses scrapings from inside the mouth for example.  But your DNA seems to test from Eastern Europe.  Ancestry states they are constantly refining their test and when they do they will re-test what they have.

    • Liz Crane

      Nobody has a perfect prediction of ethnicity at this point--it is a very challenging thing to do given the migration patterns of people throughout history, etc.  The various models on GEDMatch are based on different databases, different assumptions, etc than Ancestry's model.  No way to say if one is more right than the other--none of them are going to be entirely accurate.  The best thing you can do is look at Ancestry's info, then run through several different ones of the admixture calculators available on GEDMatch (sounds like you just tried one?) and look at themes/trends that appear in common across multiple calculators--those are the bits that are probably closest to the "truth".  And for the areas of difference, read up as much as you can on the models & the regions--perhaps there is a lot of overlap between one region & another so you get classified one way in one model and the other way in another, etc.

    • Frank Sperling

      Thanks Erich and Liz...your input helps.

    • SallyStetson

      In my personal experience, after testing with 23andme and Ancestry, then also running the results through gedmatch, so far Ancestry most closely matches my paper trail.  Of course, we are different ethnicities so your results may vary, it could be they're better at doing my areas than yours.

      Gedmatch will give you a bunch of different results (mine vary widely) depending on which calculator you use, and when comparing to each other it's very confusing, because they don't use the same geographic identifiers. It's like comparing apples to oranges.

      When I began all this testing of my family, I'd thought it was more of an exact science.  It's really just a lot of guesstimations.

    • Caroline T.

      Frank,

      It doesn't surprise me that you have 100% Jewish European on Ancestry and a mixture of ethnicities including a large percentage of Ashkenazi when using the Jtest on Gedmatch.  I'll be the first to admit that I'm far from an expert on this, but I did some research on the Ashekenazi after finding the Jtest indicated that my daughter has roughly 4.44% Ashkenazi and my dad has roughly 4.27%.  (Now I really can't wait to get the rest of us done to try to confirm that these results are not random.)  From what I've read, Ashkinazic Jews are primarily from the area along the Rhine river that is Northern France and western Germany; as well as, Eastern Europe.  Considering that people didn't always stay in one place and that different areas overlap, the admixture that you got from Gedmatch (in my opinion) seems to line up nicely with your Ancestry results. 

      Caroline T.

      Volunteer Community Moderator