AP BIOLOGY

HEREDITY

INCOMPLETE DOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A parent with the alleles IAIB could produce offspring with which types of blood?
A
Type A
B
Type B
C
Type AB
D
Type A, Type B, or Type AB
Explanation: 

Detailed explanation-1: -Finally, the parental genotypes in option (D), IAIB and IAIB, have a 50 percent chance of producing offspring with blood type AB, a 25 percent chance of producing offspring with blood type A, and a 25 percent chance of producing offspring with blood type B.

Detailed explanation-2: -The human ABO blood group is controlled by a single autosomal gene with three alleles, IA, IB and i. Individuals with either the IAIA or IAi genotypes have blood type A. Those with IBIB or IBi have blood type B. Those with IAIB have blood type AB, and those with ii have blood type O.

Detailed explanation-3: -One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.

Detailed explanation-4: -Answer and Explanation: The phenotype type of the genotype blood IAIB is AB.

Detailed explanation-5: -Believe it or not, in this case having a blood type different from either parent is by far the most common result. In most cases, an O parent and an AB parent will have only A or B kids.

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