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Human skin color is a polygenic trait, which means that multiple gene loci (with different alleles) are involved in its expression. It has been shown that there more than 350 genetic loci involved in determining skin color. Because of that, there is the enormous number of possible genotypes for the skin color and as a result, the phenotypes vary from the darkest brown to the lightest hues.  Different populations have different allele frequencies of genes for human skin color, and the combination of these allele variations brings about complex and continuous variation in skin coloration. Natural skin color can change due to exposure to sunlight (becomes darker) and that is the way it adapts to intense sunlight irradiation (protection against the UV exposure).

Human skin color is a polygenic inheritance, and color intensity depends upon the frequency of genes.

What is Polygenic inheritance?

When an inherited trait is controlled by more than two alleles in the population then it is called Polygenic inheritance.

For example- Human skin color is controlled by multiple alleles. Multiple copies of an allele are present in the different loci in DNA.

 

The frequency of these alleles in a person is responsible for the skin color of a person. If a person has more Dominant genes copies then his/her color will be darker.

Therefore, human skin color is a polygenic inheritance, and color intensity depends upon the frequency of genes.

Learn more about Polygenic inheritance:

https://brainly.com/question/984479

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