NEET Biology question

The mother and father of a person with 'O' blood group have 'A' and 'B' blood groups respectively. What would be the genotype of both the mother and father?

(A)Mother is homozygous for 'A' blood group and father is heterozygous for 'B'
(B)Mother is heterozygous for 'A' blood group and father is homozygous for 'B'
(C)Both mother and father are heterozygous for 'A' and 'B' blood group, respectivelyCorrect
(D)Both mother and father are homozygous for 'A' and 'B' blood group, respectively

Answer: (C)

Solution

An 'O' group () child must receive an allele from each parent. Since the mother shows blood group A, she must therefore be (heterozygous), not (which could not transmit an );

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Question ID VK-120402