Due to a genetic mutation, a mouse is born with fur that is not as light as fur in other mice of the same population. This makes it easier for the mouse to blend into the environment.

How will this mutation most likely affect the mouse and the population?

This will most likley affect the population because that gene is going to be dominant which will change the popluation of the mutation, another way to look at this is evolution.

Explanation:

The more offsprings the mouse with the not as light fur has the more possibilities for the population will change.