Principle Of Inheritance And Variation Question 292

Question: Parents of blood groups O and AB cannot have a child of group AB because [MP PMT 1992]

Options:

A) Gene O is dominant over gene A

B) Gene O is dominant over gene B

C) Gene A or B is absent in one of the parents

D) Gene A and B are absent in one of the parents

Show Answer

Answer:

Correct Answer: D

Solution:

Hetrozygous IA/IB individual are blood group AB. Both the A antigen (Product of the IA alleles) and the B antigen (Product of the IB alleles) are produced by them.