Northwestern U.S.

Southwestern U.S.

Southeastern U.S.

Northeastern U.S.

Most mice have sandy, light-colored coat to match the environment where they live.

Most mice have dark colored fur to match the environment where they live like their ancestors.

Most mice contrast with their environment.

Most mice are heterozygous for fur color and therefore display both phenotypes.

The mutation produced dark colored mice who were better able to survive and reproduce in basalt environments.

The mutation produced light colored mice who were better able to survive and reproduce in basalt environments.

evolution is by design.

evolution of melanism is a repeatable process.

new mutations of melanism comes from a common ancestor.

evolution of melanism is random.

True

False

True

False

True

False

Predators

Genetic mutations

Rock color

True

False

True

False