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Sagot :
Alleles alter frequency within a population owing to random sampling in genetic drift. As a result, no modifications are produced.
The transmission of alleles or gametes from one group to another distinguishes gene flow from genetic drift. When a population migrates or becomes geographically isolated, this occurs.
When a population is drastically reduced in number due to a natural disaster (bottleneck effect), or when a small group breaks off from the main population to establish a colony, genetic drift can have serious consequences (founder effect).
The sort of event that produces founder events and population bottlenecks is what distinguishes them.
A founder event happens when a small number of people is isolated from the rest of the population, but a bottleneck effect happens when the majority of the population is annihilated.
For small populations, genetic drift can result in significant genetic variety loss. A population bottleneck occurs when the size of a population is decreased for at least one generation.
Learn more about to bottleneck visit here;
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