Parents with the genotypes AO and AB have a child. What are all the possible blood types of the child?

The AO parent can pass on either an A or an O allele, while the AB parent can pass on either an A or a B allele. The possible combinations are AA, AB, AO, and BO, which produce blood types A, AB, A, and B. Therefore, the possible blood types are A, AB, and B, matching choice C.

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