Question

genetic bottleneck?​

Answer 1

Answer:

A population bottleneck is an event that drastically reduces the size of a population. ... Due to the loss of genetic variation, the new population can become genetically distinct from the original population, which has led to the hypothesis that population bottlenecks can lead to the evolution of new species.

Answer 2

Answer:

genetic drift!

Explanation:

The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most indviduals and leaving behind a small, random assortment of survivors.