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which of the following mechanisms prevent gene flow after fertilization has taken place Genetic drift

Genetic drift is the arbitrary change in the population's frequency of a gene variant that already exists. Gene variations may totally vanish due to genetic drift, which would limit genetic diversity. Additionally, it can make previously uncommon alleles far more common and even fixed.Genetic drift is the chance or random event that causes the frequency of one allele to change over time in relation to the other alleles in a population. The so-called bottleneck effect is one instance in which the impact of genetic drift is amplified. Allelic drift and the Sewall Wright effect are synonyms.

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