Researchers have discovered a genetic mutation at the CCR5 locus that reduces susceptibility to HIV-AIDS infection.The mutation appears:
A)less common in European than in Asian populations.
B)most common in African populations.
C)likely related to increased resistance to smallpox and plague in Europe about 5,000 yBP.
D)none of the above

Question

Quizplus · Accepted Answer

The CCR5-Δ32 mutation is more common in European populations and is thought to have provided resistance to historical diseases like smallpox and plague, which may explain its prevalence.

Researchers Have Discovered a Genetic Mutation at the CCR5 Locus