[The white contribution in the black population of the USA].
D044383:Black People; D001789:Blood Group Antigens; D005796:Genes; D005826:Genetics, Medical; D006801:Humans; D014481:United States; D044465:White People; D001741:Black or African American
D001789:Blood Group Antigens
Det vita inslaget i USA:s svarta befolkning.