________ is due to chance events that change the allele frequencies in small populations.

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Genetic drift is a random process that can cause changes in allele frequencies in small populations. This can occur due to chance events such as natural disasters, random deaths, or breeding patterns, and can cause certain alleles to become more or less common in a population over time. Gene flow involves the movement of genes between different populations, sexual selection involves the selection of certain traits for mating success, stabilizing selection favors intermediate traits over extreme traits, and coevolution involves the reciprocal evolution of two or more species.

________ Is Due to Chance Events That Change the Allele