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Question
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 IAand IB. Which of the following could be possible genotypes of the parents of a person with type O blood?
A) IAIB and ii
B) IAiand IAIA
C) IAiand IBi
D) IAIBand IAIB
Answer
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