Question

Genetic Variation Over Time Quick Check 1 of 51 of 5 Items Question How have the historic levels of melanin in human populations changed due to migration? (1 point) Responses Humans that produced less melanin became more common as populations migrated away from the equator. Humans that produced less melanin became more common as populations migrated away from the equator. Humans that produced more melanin became more common as populations migrated toward the equator. Humans that produced more melanin became more common as populations migrated toward the equator. Humans that produced more melanin became more common as populations migrated away from the equator. Humans that produced more melanin became more common as populations migrated away from the equator. Humans that produced less melanin became more common as populations migrated toward the equator.

Answer 1

The correct response is: "Humans that produced less melanin became more common as populations migrated away from the equator."

This is because, in regions with higher UV radiation near the equator, higher melanin levels provide protection against skin damage and vitamin D degradation. Conversely, as populations migrated to areas with lower UV radiation, such as farther away from the equator, lower melanin levels became more common to allow for adequate vitamin D synthesis in conditions of less sunlight.