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by t-c-h
2140 days ago
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> DNA testing revealed that I am 47% Jewish That's not what DNA tests do. They do not tell you whether you are factually X% of A and Y% of B, as they do not have the data to make such claims and they do not have DNA of ones' ancestors except through inference. What they do tell you is that, based on current day large-scale survey data which they use to identify markers, you share certain markers with certain contemporary groups. Especially the percentages they give you should take with a grain of salt as they are approximations to a ground truth (one which nobody fully knows). |
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I didn't realize there might be an error term. But, fwiw, my father's brother mentioned almost in passing to my wife about my Jewish ancestry. Apparently one of my parents were the first to marry outside of the faith in a very, very long time. Getting back a 47% match seems to be experimental proof of this, which I was very surprised was possible.
So perhaps the error is around ~3%? I wonder what it might be...