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A client sent an article stating a set of adult identical twins recently submitted their DNA samples to five different commercial services for ancestral DNA analysis to learn about their genealogies. No two companies gave the same overall profile for either twin alone, which they explained may have been caused by using different reference panels of subjects with validated ethnicities, and differing proprietary algorithms for assigning membership to a regional grouping. But more surprisingly, all companies found differences in ancestry between the twins compared to one another. Assuming this is not just due to technical errors, what is the explanation for these twins having different DNA?
ClosedNicola asked 5 years ago • 
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