Frequency of Heterozygotes for Some Recessive Traits in Several Populations

TABLE 19.2 Frequency of Heterozygotes for Some Recessive Traits in Several Populations Trait Cystic fibrosis Sickle cell anemia Tay—Sachs disease Phenylketonuria Albinism Heterozygote Frequency 1/25 whites; much lower in those of West African or Asian descent 1/12 among those of West African ancestry; much lower in those of European or Asian descent 1/30 among descendants of Eastern European Jews; 1/350 among others of European descent 1/55 among those of European descent; much lower in those of West African or Asian ancestry 1/10,000in Northern Ireland; 1/67,8OO in British Columbia © Cengage Learning