Guinea pig
Mark even used his own DNA as guinea pig material, but he didn't get the result he expected. It turned out that he had 25 per cent African ancestry.
'No one in my family had ever discussed the fact that we had this recent West African ancestry, but I think it's great. I've studied admixture for 10 years now and I'm even an example myself. And I'm not unique among American whites. Our best estimates now put the level of European Americans with West African ancestry at around 10%, each having about one great grandparent of African ancestry.'
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