Suppose That in Guinea Pigs ABO Blood Types Are Determined

Multiple Choice

Suppose that in Guinea pigs ABO blood types are determined like in humans,where I^A and I^B are expressed codominantly and i (blood type O) is recessive to both.During a set of routine crosses you notice something unusual: Repeated matings between a certain female with blood type AB and a certain male with blood type A produces F₁ Guinea pigs of all four blood types in the following ratios: 5A : 2B : 4AB : 1O.The genotypes of the parents are most likely:

A) I^A/I^B for the female and I^A/I^A for the male.
B) I^A/I^B for the female and I^A/i for the male.
C) I^A/I^B/i for the female and I^A/I^A for the male.
D) I^A/I^B/i for the female and I^A/i for the male.
E) None of the answer options are correct.