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Published online by Cambridge University Press: 05 March 2022
As a recreational activity, with no serious consequences at stake, it barely matters whether the results consumers receive from their DNA ancestry tests accurately represent the percentages of their ancestry from different geographical regions. Given that there are no international standards for such testing, unlike genetic disease tests, it is not surprising that the results from different ancestry testing companies vary. As noted in Chapter 4, there are several stages in the analysis of a person’s saliva or cheek swabs where the criteria, reference frames, or analytics can vary among companies, yielding different outcomes.
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