MHT CET Biology question

Four children belonging to the same parents have the following blood groups A, B, AB and O. Hence the genotypes of the parents are

(A)Both parents are homozygous for 'A' group
(B)One parent is homozygous for 'A' and another parent is homozygous for 'B'
(C)One parent is heterozygous for 'A' and another parent is heterozygous for 'B'Correct
(D)Both parents are homozygous for 'B' group

Answer: (C)

Solution

All four groups arise only from (offspring , , , );

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Question ID VK-059397