In a population of beatles there are green and brown colorations that occur with equal frequency. after a forest fire, only 20 beatles remain. 18 of them are green and two of them are brown. what describes this change in frequency’s

C) A population bottleneck occurred, altering the resulting allele frequencies.

Explanation:

Population bottleneck can be described as the reduction which occurs in a population due to any environmental factor like fire or due to the activities of humans like hunting etc.

A large number of Beatles got killed due to the fire. The reduced population that is left has an altered gene frequency. This phenomenon can be described as a genetic drift that has occurred and caused changes in the genetic frequencies.

a community that experiences major changes undergoes progress

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.