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  4. Person having genotype IA IB would show the blood group as AB. This is because of

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Q. Person having genotype $I^A\, I^B$ would show the blood group as $AB$. This is because of

Principles of Inheritance and Variation

Solution:

Explanation: When $F_1$ generation resembles both parents, this is called co-dominance. This is often seen in $ABO$ blood grouping. Since both $A$ and $B$ sugars are dominant, hence it results in the $AB$ blood group.