Question

Which of the following is the only possible blood group of progeny obtained from parents that have IAIA and IBIB as their genotypes?

(a) A

(b) B

(c) AB

(d) O

I have been asked this question in examination.

Origin of the question is Inheritance Principles in chapter Principles of Inheritance and Variation of Biology – Class 12

Answer 1

Correct answer is (d) O

To elaborate: The only possible allele that can be produced by IAIA parent is IA. Similarly, the only possible allele that can be produced by IBIB parent is IB. The progeny produced will have the alleles IA and IB. Thus, their blood group will be AB.