Schaefer Page 10: As we will see, race is a socially constructed concept (J. Young 2003). Schaefer - Page 10: The way the term race has been used by some people to apply to human beings lacks any scientific meaning. We cannot identify distinctive physical characteristics for groups of human beings the way scientists do to distinguish one animal species from another. The idea of biological race is based on the mistaken notion of a genetically isolated human group. Schaefer Page 10: Biologically there are no pure, distinct races. For example, blood type cannot distinguish racial groups with any accuracy. Furthermore, applying pure racial types to humans is problematic because of interbreeding. Despite continuing prejudice about Black-White marriages, a large number of Whites have African American ancestry. Scientists, using various techniques, maintain that the proportion of African Americans with White ancestry is between 20 and 75 percent. Despite the wide range of these estimates, the mixed ancestry of todays Blacks and Whites is part of the
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