When I discussed these findings with the sociologist Orlando Patterson, he pointed out that the fraction of the European ancestry in African Americans that came from males—which if different from half is called “sex bias”—must have been far greater during the time of slavery. Since the civil rights movement in the United States in the mid-twentieth century, cultural changes have caused the sex bias to reverse, with more coupling between black men and white women. If we carried out DNA studies of African American skeletons from a hundred years ago,
Woo hoo a sociologist
