AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A man has blood type A (heterozygous) and a woman has blood type B (heterozygous). What are the possible blood types of their kids?

A	A or B only
B	AB only
C	A, B, AB only
D	A, B, AB, or O

Explanation:

Detailed explanation-1: -One parent with A and another with B can produce a child with A, B, AB or O blood types.

Detailed explanation-2: -When one of the inherited alleles is A and the other is B, the genotype is heterozygous and the blood type is AB. AB blood type is an example of co-dominance since both traits are expressed equally.

Detailed explanation-3: -The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous (IAIA or IBIB, respectively), or heterozygous (IAi or IBi, respectively).

Detailed explanation-4: -No, a child with type B blood would not be the result of two parents with type A blood regardless of the genotypes. With type A blood, there are two genotype possibilities which are AO and AA.

There is 1 question to complete.