A change in allele frequency following a dramatic reduction in the size of a population is calledA.disruptive selection.B. bottleneck effect.C.stabilizing selectionD.genetic drift.
Question
A change in allele frequency following a dramatic reduction in the size of a population is calledA.disruptive selection.B. bottleneck effect.C.stabilizing selectionD.genetic drift.
Solution
The correct answer is B. Bottleneck effect.
Here's why:
A. Disruptive selection is a type of natural selection that selects against the average individual in a population. This is not what we're looking for.
B. The bottleneck effect refers to a significant reduction in a population size due to environmental events (such as earthquakes, floods, fires, disease, or droughts) or human activities (such as genocide). This reduction can cause a change in the genetic variation of the population, which is what the question is asking about.
C. Stabilizing selection is a type of natural selection that favors the average individual in a population. This is not what we're looking for.
D. Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error). While genetic drift could potentially cause a change in allele frequency following a dramatic reduction in the size of a population, it is not the most accurate answer because it does not specifically refer to a reduction in population size.
Therefore, the best answer is B. Bottleneck effect.
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