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jewish ancestry from DNaA errors explained -will be improved

Replies: 3

Re: jewish ancestry from DNaA errors explained -will be improved

Posted: 1408913027000
Classification: Query
I think the tests are reliable but overly optimistic. I have not done any testing with Ancestry but I have done it with FamilyTree DNA. My results are similar to the poster's wife: about 350 3rd-5th cousins and about 3,500 total matches.

I think there are two root causes.
1. Ashkenazi jews are very inbred. There were a lot of marriages between cousins, meaning that we share more common DNA than more genetically diverse populations. The DNA testing firms should probably set higher matching thresholds for these inbred (endogamous) populations.
2. I have a feeling that a disproportionate number of those testing DNA are Jewish.
SubjectAuthorDate Posted
mensa73 1407870934000 
PeterDawson99 1408291859000 
mensa73 1408384106000 
creback1 1408913027000 
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