The inference drawn from the fact that there is little diversity in the form of the MC1R gene found among individuals from Equatorial Africa is that: the selective pressure caused constraint in that region because they have darker skin which is important for survival because Africa has intense sunlight.
MC1R gene has the genetic information for the coding of a protein named melanocortin 1 receptor. This receptor is involved in the pigmentation of the skin. The location of this receptor is in the surface of melanocytes.
Selective pressure is defined as the evolutionary phenomenon that favors a certain type of phenotype due to the environmental conditions over an area.
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