Question

Jessica's mother has the blood type ab and her father has the blood type o. what are the possible blood types could jessica have? draw a punnett square on scratch paper to help you answer the question, if needed.

Answer 1

The blood group of Jessica can either be A or B.

In humans, the ABO blood group follows codominance in which allele
`I^(A)` and
`I^(B)` are codominant and allele i is recessive to other two.

The blood group of a mother is AB. Thus, the genotype of the mother would
`I^(A)I^(B)`.

Similarly, the blood group of a father is O. Thus, the genotype of the father would be ii.

The cross would result in the production of offspring with two possible types of blood groups
`I^(A)`i and
`I^(B)`i.

Thus, the blood group of the offspring (Jessica) can either be A or B.

Answer 2

The possible blood types are A and B.

The phenotype of the mother is AB, so the genotype can only be AB.

The father's phenotype is O so his genotype should only be OO.

if we cross between AB and OO it gives us either AO or BO, so the possible phenotypes are either A (if the genotype is AO) or B (if the phenotype is BO).