Which of the following scenarios would most likely result in the microevolution of a population of humans?
A. Only random mating takes place among all the people that reproduce in North America.
B. The incidence of skin cancer in adults over age 40 rises significantly.
C. Hundreds of thousands of people are killed in a natural disaster.
D. All of the listed responses are correct.
E. A colony of humans on the moon is isolated from Earth.

Option (E), which describes a human colony on the moon that is cut off from Earth, is the best choice because it most closely resembles the scenarios that would most likely lead to the microevolution of a human population.

What does microevolution mean?

Changes in a gene's frequency in a population are referred to as microevolution. These are minor modifications that can take place quickly and may go unnoticed by an untrained eye. Small-scale evolution is called microevolution (within a single population). Using animals with brief life cycles, such as fruit flies, guppies, and bacteria, which allow testing over many generations, biologists have proved microevolution in the laboratory.

What are the two main driving forces for microevolution?

The microevolutionary causes:

Mutations are one of the most likely sources of alterations that result in new alleles.

Genetic drift is a phenomenon that is seen in smaller populations where evolution is the consequence of unplanned shifts in allele frequency.

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