Which statement is an example of a beneficial mutation?

Question

Responses

A fawn in the forest has a mutation that causes its fur color to be white.
A fawn in the forest has a mutation that causes its fur color to be white.

A person has a mutation that causes him to be unable to fully digest lactose.
A person has a mutation that causes him to be unable to fully digest lactose.

A mosquito has a mutation that causes it to be more resistant to pesticides.
A mosquito has a mutation that causes it to be more resistant to pesticides.

A person has a mutation that causes her earlobes to be attached to her head.
A person has a mutation that causes her earlobes to be attached to her head.

Answer 1

The statement that represents an example of a beneficial mutation is:

A mosquito has a mutation that causes it to be more resistant to pesticides.

This mutation is considered beneficial for the mosquito because it increases its chances of survival in an environment where pesticides are used. The other examples either do not confer a clear survival advantage or are neutral in terms of fitness.