Question

in a cross of blood type a (i^a i^a) and blood type b (i^b i^b), what blood types are possible in offspring?
type ab only
type o only
type a and type b
type a, type b and type ab

Explanation:

To determine the possible blood types of offspring from a cross between blood type A (\(I^A I^A\)) and blood type B (\(I^B I^B\)), we analyze the gametes produced. The blood type A parent (\(I^A I^A\)) can only produce gametes with the \(I^A\) allele. The blood type B parent (\(I^B I^B\)) can only produce gametes with the \(I^B\) allele. When these gametes combine, the offspring will have the genotype \(I^A I^B\), which corresponds to blood type AB. So, only blood type AB is possible.

Answer:

A. Type AB only