In your textbook,the smaller frequency of sickle-cell anemia among present day American blacks as compared to West African blacks is attributed to:
A)genetic drift.
B)gene flow.
C)new mutations.
D)none of the above

Question

Quizplus · Accepted Answer

The smaller frequency of sickle-cell anemia among present day American blacks as compared to West African blacks is attributed to gene flow, which is the movement of genes from one population to another through migration. As the African slaves were brought to America, the frequency of the sickle-cell allele decreased due to gene flow with other populations that did not have this allele.

In Your Textbook,the Smaller Frequency of Sickle-Cell Anemia Among Present