First slide

Inheritance of One Gene

Question

A man with blood group A marries a woman with blood group AB. Which amongst the following cannot be the blood group of the offspring?

Easy

A

A
B

B
C

AB
D

O

Solution

If a man with blood group A marries a woman with blood group AB. Then the genotype of the man can be I^AI^Aor I^Ai. The woman will have genotype I^AI^B. When I^AI^Ais crossed with I^AI^B. Then the offspring will have blood group A or blood group AB. When I^Aiis crossed with I^AI^B, then the offspring can have genotype of A, B or AB. But in either of the cases O blood group is not possible.

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