Question

Question #58ad7

Answer 1

You set up a Punnett square using the parent's genotypes. The Punnett square will give you the offspring's genotypes. Then you will use these genotyes to interpret the offspring's phenotypes.

Explanation:

The mother has two different alleles, A and B. The man has two identical alleles, O and O.

The offspring will inherit an O allele from the Dad no matter which allele it gets from the mother. From the mother it can inherit either an A or a B. Hence the possible genotypes for the offspring are AO and BO.

Answer 2

All the children of this match will be either

AO `larr` Heterozygous type A
`color(white)(.......)`- or -
BO `larr` Heterozygous type B

Explanation:

Mother x Father
`color(white)(.)` AB     x `color(white)(.)`OO

Each child inherits one allele from the mother -- either the gene for type A blood, or the gene for type B blood.

A _

B _

Each child also inherits one allele from the father -- but in his case, both his alleles are the same, so they all get one gene for type O blood from him.

That means that the only two outcomes for the children of this match are either:

AO `larr` Heterozygous type A

BO `larr` Heterozygous type B