An earthquake causes the size of a deer population to drop rapidly over a short

Question

An earthquake causes the size of a deer population to drop rapidly over a short period. Allele frequencies shift. What mechanism of evolution does this situation illustrate?
A. Artificial selection B. Migration C. Genetic drift-bottleneck effect D. Natural selection E. Genetic drift -founder effect F. Disruptive selection G. Sexual selection An earthquake causes the size of a deer population to drop rapidly over a short period. Allele frequencies shift. What mechanism of evolution does this situation illustrate?
A. Artificial selection B. Migration C. Genetic drift-bottleneck effect D. Natural selection E. Genetic drift -founder effect F. Disruptive selection G. Sexual selection
A. Artificial selection B. Migration C. Genetic drift-bottleneck effect D. Natural selection E. Genetic drift -founder effect F. Disruptive selection G. Sexual selection

Explanation / Answer

C. Genetic drift-bottleneck effect

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There are two major types of genetic drift: population bottlenecks and

thefounder effect.

A population bottleneck is when a population's size becomes very small very quickly. This is usually due to a catastrophic environmental event, hunting a species to near extinction, or habitat destruction.

The Bottleneck Effect occurs when there is a disaster of some sort that reduces a population to a small handful, which rarely represents the actual genetic makeup of the initial population. This leaves smaller variation among the surviving individuals.

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