If the frequency of a particular allele that is present in a small, isolated population of alpine plants decreases due to a landslide that leaves an even smaller remnant of surviving plants bearing this allele, then what has occurred? A. A bottleneck B. Genetic drift C. Microevolution D. A and B only E. A, B, and C are all correct.

Microevolution is an evolutionary change that is said to occur on a small scale within a population of species over a short period of time. This can be seen in the case of the population of alpine plants. The change is within the population.

Genetic drift, by definition is the change in the allele frequencies, as can be seen in the alpine plants, which is brought about by a bottleneck effect. In order words, bottleneck effect occurs when a population size is reduced drastically as a result of environmental events such as landslide, that can be seen in the case of alpine plants. This genetic drift example randomly selects the surviving individuals in this microevolution.

andromache andromache · Answer 2 · 2022-03-15T18:24:15+01:00

At the time when the frequency of the specific allele should be present so here the bottleneck, genetic drift, and the microevolution should be considered. Hence, option E is correct.

What it should be occured?

In the bottleneck effect, the frequency of the population should be changed because of the specific event like as a natural calamity. In genetic drift, frequency changed owing to the disappearance of the genes. And, In microevolution, the changes occur because of genetic drift, selection, gene flow and mutation.

Therefore, the option E is correct.

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