Question

Is dark skin recessive?

Answer 1

Polygenic inheritance:

1. Human skin is a polygenic trait that is governed by two or more genes.
2. Polygenic or quantitative inheritance refers to the inheritance of polygenic traits.
3. In humans, polygenic inheritance can be seen in height, skin color, eye color, and weight.

Skin color:

1. The darkest skin color indicates the presence of three dominant alleles (AABBCC).
2. Therefore dark skin is a dominant character.
3. The lightest skin color indicates the presence of recessive alleles (aabbcc).
4. Because melanin is a dominant phenotype, and all-white skin genes are recessive.