DNA ancestry tests — and their many caveats — explained - Vox

DNA ancestry tests — and their many caveats — explained - Vox

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The thing about me is that I'm Jewish. It's not the only thing about me. I'm also 5 feet 11 inches tall, a glasses wearer and into cycling. However many people who understand me probably would not be amazed to find out that most of my forefathers resided in shtetls in Eastern Europe.


(Ashkenazim are Jews who trace their ancestry back to Yiddish-speaking populations inhabiting the region in between France and Russia.)Here's what was a bit unexpected, though: None of the business Ancestry, DNA, 23and, Me and National Geographic, which works with a testing business called Helix could settle on just how Ashkenazi I am.


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This little Rafi-spit-in-a-tube, it reported, was only 92 percent Ashkenazi, however a full 3 percent Iberian. The rest of the DNA, according to Origins, may have traced back to the Middle East and European South or other areas. But each of those sources represented, at most, less than 1 percent of my DNA, according to the site.(Image credit: Origins)(Live Science sent a third sample of my DNA to Ancestry under a 3rd name, but a mistake avoids us from accessing the results.)Like Ancestry, DNA, 23and, Me concluded from the very first DNA sample that my Ashkenaziness ranks somewhere in the low 90s, with a smidge of difference between each of the samples it received.


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(Offered what I understand of my household history, this is likely not true.)Nevertheless, while I was reporting on this story, 23and, Me upgraded its system for interpreting DNA samples and reassessed all the DNA already in its system. Now, when I log into 23and, Me using the three different names I offered, the reports for two of those names say that I have 100 percent Ashkenazi origins.



Live Science assigned a woman's name to one of the samples that it sent to each company and marked its sex as female. Origins, DNA processed its "female" sample just fine, without any sign of anything unanticipated, but both 23and, Me and Nat Geo required more personal info before continuing, given that it was from an individual with unexpected chromosomes.)(Image credit: 23and, Me)Finally, there's Nat Geo, which utilizes a service called Helix to do its DNA screening.