What can fish color tell us about human pigmentation Skin co

What can fish color tell us about human pigmentation? Skin color is often one of the first traits people notice in each other. Studies in zebra fish uncovered a mutation that altered a transport protein and resulted in light-colored fish. This discovery led to the finding that the same gene in humans has a strong influence on skin pigmentation in many populations. The allele of the human transport protein associated with light skin is found almost exclusively in Europeans. The other common allele, which appears to be the ancestral allele, is found in Africans. Explain how you think the allele present in Europeans came to be so common in this population. Select all that apply. Amputation must have occurred in the population ancestral to modern Europeans either before or after their migration to Europe This mutation was dominant For this reason, over generations, the allele became more and more frequent This mutation gave a reproductive advantage to people who carried it in the environments of Europe So over generations, the allele became more and more frequent until it predominated in this population Amputation must have occurred in the population ancestral to modern Europeans before their migration to Europe. Amputation must have occurred in the population ancestral to modern Europeans after their migration to Europe. The same mutations have occurred very often, so the allele became more and more frequent until it predominated in this population

Solution

The correct Statements are:

A mutation must have occurred in the population ancestral to modern Europeans either before or after their migration to Europe.

This mutation gave a reproductive advantage to people who carried it in the environments of Europe. So, over generations, the allele became more and more frequent until it predominated in this population.

When humans started migrating out of Africa, some of them settled in colder, darker climates of Europe. In the climatic conditions of Africa which, dark skin was an advantage since melanin responsible for protection against UV rays.

However, in the darker regions of Europe, the lesser radiation virtually makes it impossible to synthesize vitamin D. As a result, people who had mutation that led to less melanin, which allowed them to absorb more UV light. This might have enabled them to synthesize vitamin D better than those who had dark skin. Thus, people with light skin had increased reproductive success in their sun-poor environments.