Why do people are dark & other lighter in skin tone
Hi Rohan,
Genes can influence skin and hair pigmentation in many ways. The overall color of the skin results from both the number of pigment-making cells (called melanocytes) and their level of activity.More than 20 genes are known to influence skin pigmentation in humans. Genetic changes can alter the development and migration of melanocytes, the regulation and expression of genes that generate melanin, or the chemical steps in the synthesis of the pigments themselves. As a result of such genetic changes, two people who live in the same environment may have very different shades or patterns of skin coloration.
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