Why might genetic drift occur if a small number of individuals colonize a new habitat?

Answer 1

Genetic drift will occur if small population of individual colonize a new habitat because of reduction of gene pool of a population

Small numbers of individuals who tend to colonize new habitats are more vulnerable to random sampling error, as genetic drift is defined as a change in allelic frequency that results from random sampling error from one generation to the next. Additionally, small numbers of individuals that act as a source of a new population result in a small gene pool of the population.

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Answer 2

William Albracht

Genetic drift may occur when a small number of individuals colonize a new habitat due to the founder effect. In this scenario, the genetic makeup of the founding population may not be representative of the original population, leading to genetic drift as certain alleles become more prevalent or are lost due to chance events in the small founder population.

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Answer from HIX Tutor

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