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?Multiple Choicesexual selectionmigrationartificial selectiongenetic drift - bottleneck effectgenetic drift - founder effectdisruptive selectionnatural selection
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?Multiple Choicesexual selectionmigrationartificial selectiongenetic drift - bottleneck effectgenetic drift - founder effectdisruptive selectionnatural selection
Solution
This situation illustrates the genetic drift - bottleneck effect. This mechanism of evolution occurs when a population's size is drastically reduced, leading to a loss of genetic variation. The surviving population may have different allele frequencies, purely by chance, compared to the original population. This is exactly what happened to the deer population after the earthquake.
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