Question

"a woman with type a blood and a man with type b blood have a baby with type o blood. what are the genotypes of the woman and the man?"

Answer 1

A woman with blood type A and a man with blood type B can have a child with blood type O if both parents have genotypes AO and BO, respectively, each contributing the recessive i allele to the child.

Step-by-step explanation:

If a woman with blood type A and a man with blood type B have a baby with blood type O, it means that both the woman and man must carry the recessive allele, i, because type O is characterized by having two recessive alleles (ii). Since both A and B are dominant blood types, the woman's genotype must be AO and the man's genotype must be BO, so that they can each pass on the recessive i allele to their child, resulting in blood type O (ii). The possible phenotypes of their offspring in terms of ABO blood group would be A (AO or AA), B (BO or BB), AB (AB), or O (ii).

Answer 2

i^A i and i^B i
heterozygous because they have to have a recessive gene in each parent