Question

If parent blood group A and AB, then which is not possible blood group in progeny?

• A. A
• B. AB
• C. B
• D. O

Hint:

For O blood type to occur in progeny, both parents must carry the O allele. If either parent has blood group A or AB, O cannot be inherited.

Answer 1

The Correct Option is D

The ABO blood group system is based on the presence of antigens on the surface of red blood cells. - Parent blood groups A and AB: - Parent 1 (blood group A) can contribute either A or O allele. - Parent 2 (blood group AB) can contribute either A or B allele. Thus, the possible combinations for the progeny are: - AA (Blood group A) - AB (Blood group AB) - AB (Blood group AB) - BB (Blood group B) It is not possible for the progeny to have O blood group because, for O blood group, both parents must carry the O allele, which is not possible if one parent is group A and the other is group AB. Hence, O is not a possible blood type for the progeny. Thus, the correct answer is (d) O.