Question

Which one of the following best describe polygenic inheritance?

• A. ABO blood group in human and flower colour of Mirabilis jalapa
• B. Hair pigment of mouse and tongue rolling in humans
• C. Human eye colour and sickle-cell anaemia
• D. Human height and colour of skin and eyes

Answer 1

Answer: (D)

Human height and colour of skin and eyes

Answer 2

In polygenic inheritance several sets of alleles may produces cumulative effect on the same character, i.e., human height and colour of skin and eye. $ABO$ group in human is an example of codominance whereas flower colour of four $O$' clock plant is an example of incomplete dominance. Hair pigmental mouse is an example of recessive epistasis. Sickle-cell anaemia is an example of codominance.