Two Populations of Mice Exist: One Lives in an Area

question 50

Essay

Two populations of mice exist: one lives in an area with light rocks and the other lives in an area of dark rocks.A dark mouse from the population living on dark rocks migrates to the area of light rocks and breeds with mice there.Will this alter the allele frequency in the population? Discuss both changes that may or may not be seen in the next generation and in following generations.

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Definitions:

Brain Stem

The part of the brain connecting the spinal cord with the forebrain and cerebrum, controlling vital functions such as breathing and heart rate.

Base of the Skull

The inferior portion of the skull upon which the brain rests, consisting of several bones that include the occipital, sphenoid, and parts of the temporal bones.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back, transmitting neural signals between the brain and the body.

Phrenology

The now-discredited theory that different brain areas account for specific character and personality traits, which can be “read” from bumps on the skull.