Question

genetic drift in a population affects the gene pool in which of the following ways?
○ decrease in genetic variation
○ increase in genetic variation
○ increased in mutations
○ decreased in gene flow

Explanation:

Genetic drift is a mechanism of evolution where random changes in allele frequencies occur, especially in small populations. It typically leads to a reduction in genetic variation because certain alleles may be lost due to chance events (like bottlenecks or founder effects), rather than natural selection. An increase in genetic variation is incorrect as drift reduces variation. Genetic drift doesn't directly increase mutations (mutations are random changes in DNA, separate from drift). Decreased gene flow is about movement of genes between populations, not directly related to drift's effect on a single population's gene pool. So the correct option is the one about decreasing genetic variation.

Answer:

A. decrease in genetic variation