Refer to the Scenario Below, and Then Answer the Following

question 68

Multiple Choice

Refer to the scenario below, and then answer the following question(s) .
Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have brown eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes.
-No new settlers arrive,and nobody leaves the island.After a few generations,the percentage of blue-eyed individuals increases from the original zero to 25 percent.This is probably due to which of the following factors?

• A)genetic drift
• B)mutation
• C)gene flow

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Definitions:

Research Evidence

consists of findings from systematic investigation and analysis that support or refute hypotheses, theories, or practices.

Sensitivity to Stimulation

A trait describing individuals who experience a deeper or more intense response to external sensory stimuli.

Heritability

A measure of how much of the variation in a trait among individuals within a population is due to genetic differences.

Extraversion

A personality trait characterized by high levels of sociability, talkativeness, and energetic behavior.