Question

irene knows her blood type is a, but william does not know his blood type. however, william knows that his mother and father both had blood type b. irene and william's first child is a boy with type o blood. based on this information and the fact that the abo blood group has multiple alleles with varying dominance patterns, william's blood type could be....

Answer 1

William's possible blood type is B with a genotype of BO, since he and Irene (blood type A), who carries the recessive O allele, have a child with blood type O.

Step-by-step explanation:

The question asks about the possible blood type of William given that he has parents with blood type B and his child with Irene, who has blood type A, is of type O. The blood type in humans is a classical example of inheritance of multiple alleles, which include IA (type A), IB (type B), and i (type O), with A and B showing codominance and both being dominant over O. Since William's parents both have type B blood, they could have the genotypes BB or BO. Therefore, William must have inherited one B allele from each of his parents. Given that Irene and William's child has type O blood, which is the ii genotype, William must be a carrier of the O allele to pass it to his offspring. This means William's genotype must be BO. Hence, William's blood type could be B.