In your textbook,what is the lower frequency of sickle-cell anemia among present day Americans of West African ancestry,as compared to people living in West Africa,attributed to?
A)genetic drift
B)gene flow
C)new mutations
D)Tay-Sachs disease

Question

Quizplus · Accepted Answer

The lower frequency of sickle-cell anemia among present day Americans of West African ancestry, as compared to people living in West Africa, is attributed to gene flow. Gene flow occurs when individuals migrate from one population to another, bringing their genetic traits with them. In this case, individuals of West African ancestry who migrated to the United States brought with them a smaller frequency of the sickle-cell allele, which reduced its frequency in the population over time.

In Your Textbook,what Is the Lower Frequency of Sickle-Cell Anemia