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Cliff Birds

APBIO-7JVG5V

A fictional population of cliff dwelling birds can be either red or black. Feather color is controlled by a single gene, with black being dominant to red.

A rock slide occurs, killing a portion of the population. The dots in the picture show the distribution of birds on the cliff face, and the birds within the circle were killed in the rock slide.

Created for Albert.io. Copyright 2016. All rights reserved.

How does the final population compare to the initial population, and what is the evolutionary explanation for the change?

A

The frequency of the dominant allele was higher in the final population due to mutations.

B

The frequency of the dominant allele was higher in the final population due to sexual selection.

C

The frequency of the dominant allele was lower in the final population due to genetic drift.

D

The frequency of the dominant allele was lower in the final population due to natural selection.