An example of a beneficial mutation is
A) a mutation in collagen that causes the skin to be extra stretchy.
B) the mutation that causes sickle cell disease.
C) a mutation in the CCR5 gene.
D) a mutation in a cytokine gene that causes an allergy.
E) a mutation that causes a person to be neither right nor left-handed.

Question

Quizplus · Accepted Answer

A mutation in the CCR5 gene can confer resistance to the human immunodeficiency virus (HIV). This mutation is present in some individuals and prevents the virus from entering and infecting certain types of immune cells. This is a beneficial mutation because it confers a survival advantage against a deadly and widespread disease.

An Example of a Beneficial Mutation Is