A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of…
A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?
A and B only
A, B, and AB only
A, B, AB and O
O only
Solution
Explanation of correct option
1. The blood group of the man is \(A\), which means the possible genotypes are \(I^A I^A\) or \(\left.\right|^{A}I\). Likewise, the blood group of the woman is \(B\), which means the possible genotypes are \(I^{B^B}\) or \(I^B{ }^i\).
2. The possible genotypes are summarized in the table below-
\(\begin{array}{c|c}
& \text{Parent genotype (M, F)} & \text{Offspring genotype} & \text{Offspring phenotype} \\
\hline \text{Homozygous parents} & I^A I^A,I^B I^B & I^A I^B & A B \\
\text{Heterozygous parents} & I^A I^A,I^B i & I^A I^B,I^A i & A B, A \\
& I^A,I^B I^B & I^A I^B,I^B i & A B, B \\
& I^A, I^B i & I^A I^B, I^A i, I^B i, ii & AB, A, B, O
\end{array}\)
Final answer: A, B, AB, and \(\mathrm{O}\) are the possible blood groups of offspring when a man with blood group 'A' marries a woman with blood group 'B'.