Final answer:
The possible genotypes for a woman with equal chances of having a baby with blood group A or AB and the father are IA I0 and IB I0. The woman and father could each carry one allele for their respective blood type and one for type O. The woman could potentially donate blood to her husband if there are no other compatibility issues.
Step-by-step explanation:
Understanding ABO Blood Groups and Genetics
If a pregnant woman has an equal chance of her baby being blood group A or blood group AB, the possible genotypes of the woman and the father of her child is the one that allows for both blood types to be produced. The correct option here is (c) IA I0 and IB I0. This means that the woman carries alleles for blood type A (IA) and type O (I0) while the father carries alleles for blood type B (IB) and type O (I0). This combination could produce offspring with blood type A (IA I0) or blood type AB (IA IB) in equal probabilities.
In terms of potential phenotypes of their offspring in the ABO blood group system, they could be A (IA IA or IA I0), B (IB IB or IB I0), AB (IA IB), or O (I0 I0).
Regarding blood donation compatibility, a woman with genotype IA I0 could potentially donate blood to her husband if he does not have the isoantigen that she does, because A and O are generally considered safe to give to those with type B blood. However, the specific answer would depend on other factors such as Rh factor and any antibodies present in the woman's blood that could react with the husband's red cells.