If a man with blood group A marries a woman with blood group AB. Which of the following blood group will never be found in their children?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → O
The man is IAIA or IAi; the woman is IAIB. Every child gets IA or IB from the mother, so no child can be ii.
Option (1) A — Possible. IAIA or IAi.
Option (2) B — Possible. IBi, if the father carries i.
Option (3) AB — Possible. IAIB.
Option (4) O — Never found. A child of group O must get i from each parent. The mother (IAIB) has no i to pass on, so no child can be ii.