Question

The genotype of human skin colour is AAbbcc and AaBbcc respectively. What is the phenotype of these genotype?

• A. Light brown and dark brown
• B. Both are mullato
• C. Both are light brown
• D. Very light brown and very dark brown

Answer 1

The correct option is C Both are light brown

Human skin color is a polygenic trait, meaning it is influenced by tow or more alleles as well as the environmental conditions. It is mainly dependent on alleles A/a, B/b, and C/c (dominant/recessive). Here, the dominant alleles contribute towards lighter skin tones and the recessive ones for a darker skin tone. So, an individual with a genotype AAbbcc and AaBbcc would both have light brown phenotypes.

So, the correct answer is 'Both are light brown'.