A, B, and O blood type in humans is controlled by a single gene with three alleles: IA, IB, and i. Type O is the recessive trait. The i allele is recessive to both IA and IB. Which of the following could be possible genotypes of the parents of a person

with type O blood?

A) IAIB and ii B) IAi and IBi C) IAi and IAIA D) IAIB and IAIB


Answer: B

Biology & Microbiology

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