Selection and the Rh polymorphism.
D000354:Africa, Western; D044383:Black People; D001938:Brazil; D005260:Female; D006801:Humans; D008954:Models, Biological; D011110:Polymorphism, Genetic; D012204:Rh-Hr Blood-Group System; D012641:Selection, Genetic; D014481:United States; D044465:White People; D001741:Black or African American
D012204:Rh-Hr Blood-Group System