Question

Some genomic representation of skin colour are given blow?
(i) AA bb CC (ii) AA bb cc (iii) AA BB CC (iv) aa bb cc

• A. (i) → (iv) → (ii) → (iii)
• B. (iii) → (ii) → (i) → (iv)
• C. (iii) → (i) → (ii) → (iv)
• D. (i) → (iii) → (ii) → (iv)

Answer 1

The correct option is C (iii) → (i) → (ii) → (iv)

The genetic mechanism behind human skin color is mainly regulated by the enzyme tyrosinase, which creates the color of the skin, eyes, and hair shades. More the dominant gene more will be the production of melanin. Genome with all dominant gene have more darker in colour.

When there is a self-cross between AaBbCc, out of the 64 offsprings there will be of the darkest skin color, followed by a range of intermediate colors from dark to light. Of these AABBCC will be the darkest followed by AAbbCC, then AAbbcc and aabbcc.

Thus the correct answer is option C.