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23andme ancestry for my nuclear family. Note extreme implausible Scandi results for me. Lot of Scandi ancestry got moved to "broadly NWEuro". Should be close to mean of parents. Second pic: dataviz of genetic overlap with brother. Genomic ancestry is not an exact science _yet_.pic.twitter.com/jNJalUg1QU
Similar weird results for British&Irish and French&German. These issues probably related to the predictor's performance across generations, which mix up the blocks used in training. They presumably used old people with no foreign ancestry (e.g. all 8 GGPs local) for training.
At most conservative. Just moved a lot of stuff to broad.pic.twitter.com/ZqYqLq8F1c
The more specific/local the reference populations are, the less stable the results are. But at the continental level, ancestry results are pretty trustworthy.
Of course, but in my results, the Scandi% is obviously wrong considering the results for my family, esp. parents. Seems to be due to chip changes, according to another reply. I have the old chip (961k SNPs), other 3 have newer chip (600ish).
2.9% Ashkenazi not too shabby
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