2026 Re-NEET Principles of Inheritance and VariationMultiple alleles - ABO blood groups Easy Question 1 of 4 in Multiple alleles - ABO blood groups

For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?

A Father: $I^Ai$ and Mother: $I^Bi$
B Father: $I^Ai$ and Mother: $I^Ai$
C Father: $I^Bi$ and Mother: $I^Bi$
D Father: $I^AI^B$ and Mother: $I^Ai$

The answer is D.

Solution

Reference: NCERT Class XII, page 61.

Concept Multiple alleles - ABO blood groups

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4 questions from this chapter have appeared across 4 exam years.