This is a category error. Our definition of "race" is, to the extent it's genetically constructed at all (it's at least as much social as genetic), based on a small, superficial subset of the whole genome, mostly selected ages ago in response to climate. The idea that the rest of the genome would be strongly correlated to these phenotypical traits is in fact the extraordinary claim; not only is there not extraordinary evidence for it, but the evidence we have is mostly countervailing.