The skin pigment melanin is expressed differently according to exposure to sunlight,with a greater production of the molecule with greater exposure.However,the degree of production can never exceed the inherited genetic level.What evolutionary advantage would be gained from having this phenotypic range for skin pigmentation?
A)Skin color is an example of polygenic inheritance.
B)It allows someone to get a tan when they want to.
C)Production of the molecule would only occur when necessary.
D)Changes in skin color allow humans to look healthier.
E)Skin color is an example of a codominant gene.

Question

Quizplus · Accepted Answer

The ability to produce more melanin only when necessary allows for protection against harmful UV radiation without wasting resources on producing excess melanin. This would provide an evolutionary advantage by allowing individuals to efficiently regulate their skin pigmentation to match their level of sun exposure, reducing their risk of skin cancer and other UV-related health issues.

The Skin Pigment Melanin Is Expressed Differently According to Exposure