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Using genome-wide genotype data (or the study of genetics) to analyze 800 pairs of couples, the goal was to characterize their genetic ancestry, Yahoo reports.“By examination of spouse-pairs, we observed that individuals of Northern/Western European, Southern European and Ashkenazi ancestry preferentially chose spouses of the same ancestry, however, the degree of endogamy decreased in each successive generation, especially between Northern/Western and Southern Europeans,” researchers wrote in the journal.
