How have the historic levels of melanin in human populations changed due to migration? Human that produce less; human that produce more melanin;
Historically, the levels of melanin in human populations have changed due to migration. When early human populations migrated out of Africa to regions with less sunlight, such as Europe and Asia, there was less need for high levels of melanin to protect against UV radiation. As a result, populations in these regions began to produce less melanin, leading to lighter skin tones.
Conversely, when populations migrated to regions with higher levels of sunlight, such as Africa and parts of Asia, there was a greater need for higher levels of melanin to protect against UV radiation. As a result, populations in these regions began to produce more melanin, leading to darker skin tones.
Overall, the historic levels of melanin in human populations have been influenced by migration patterns and the need for protection against the sun's UV rays.