One problem with these assignments is admixture. Many people have a highly varied ancestry. For example, in the United States, colonial and early federal history were periods of numerous interracial relationships, both outside and inside slavery. This has resulted in a majority of people who identify as <answer>African</answer> American having some European ancestors. Similarly, many people who identify as white have some <answer>African</answer> ancestors. In a survey in a northeastern U.S. university of college students who identified as "white", about 30% were estimated to have up to 10% <answer>African</answer> ancestry.
Who do many people who identify as white have for ancestors?
African