A, B, and O Blood Type in Humans Is Controlled

question 38

Multiple Choice

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

• A) I^AIB and ii
• B) I^Ai and I^AIA
• C) I^Ai and I^Bi
• D) I^AIB and I^AIB

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