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 AB blood? Select all that apply. ii &1BIB 1B&Ai Ai&1A AA&ii Ai&B1A.