Researchers have discovered a genetic ________ likely related to increased resistance to smallpox and plague in Europe about 5,000 years ago that reduces susceptibility to ________.
A)anomaly;smallpox
B)trait;sickle-cell
C)mutation;HIV infection
D)locus;HIV infection

Question

Quizplus · Accepted Answer

The correct answer is "mutation;HIV infection" because researchers have found a genetic mutation that historically increased resistance to smallpox and plague, and this same mutation is known to reduce susceptibility to HIV infection.

Researchers Have Discovered a Genetic ________ Likely Related to Increased