5. Patrick met Patti at the dance. Both of them are heterozygous for their pink body color, which is
dominant over a yellow body color. Create a Punnett square to show the possibilities that would result it
Patrick and Patti had children. HINT: Read question #3!
List the possible genotypes his children could have AND next to each genotype,
describe what phenotype it would have.
B.
What is the genotypic ratio?

Answer: If P is pink body color trait and p is yellow body color trait, and P is dominant over p which is recessive, therefore heterozygous for pink body color is Pp.

The possible genotypes of their children are PP, Pp and pp. There are 1PP, 2Pp and 1pp genotypes.

Genotypes ==> Phenotype

PP = pink body color

Pp = pink body color

pp = yellow body color

Genotypic ratio= 1PP : 2Pp : 1pp, which is, one homozygous pink body color : two heterozygous pink body color and 1 homozygous yellow body color.

Explanation:

PP will manifest phenotypically as pink body color, Pp will manifest phenotypically as pink body color while pp will manifest as yellow body color. This is because pink body color trait (P) is dominant over yellow body color trait (p) which is recessive.

See the attached punnett square for illustration