Blood type A and B are dominant over type o Complete a Punnett square and determine the

expected genotypes and phenotypes from crossing a person who has heterozygous type B and a

person with heterozygous type A

O te

mogen

0 a 99

Genotypes: AB, Bo, Ao, and oo

Phenotypes: Blood types AB, B, A, and O

Explanation:

Heterozygous type B means the genotype of Bo; there is no little 'b,' and AB would mean blood type AB. Likewise, heterozygous type A would mean Ao. Thus, after a cross of Bo and Ao, you would get the following genotypes: AB, Bo, Ao, and oo, and respectively, the phenotypes of blood type AB, B, A, and O.