Many people in Africa often have dark skin. Those who live near to the equator often have the darkest skin tone. This is quite often the case for a good portion of South America as well. Around the world, skin tone has some correlation to the level of sunlight in that particular region. From an evolutionary standpoint skin tone is an adaptation to environmental conditions. What accounts for this difference in skin tone?

Question

Quizplus · Accepted Answer

Melanin levels found in the skin account for the difference in skin tone. Melanin is a pigment that is produced by cells called melanocytes. It absorbs the UV radiation in sunlight, and helps to protect the skin from damage that can cause skin cancer. People who live in regions with more sunlight have higher melanin levels to protect their skin, resulting in a darker skin tone.

Many People in Africa Often Have Dark Skin