Answer:
IAIB
Explanation:
In the genetics of ABO blood types, there is one locus I, with three types of alleles A, B and i. A is dominant over i, B is dominant over i, A and B are codominant. Possible genotypes are:
A blood type: IAIA and IAi
B blood type: IBIB and IBi
O blood type: ii
AB blood type: IAIB
