Final answer:
To predict leaf color in the 4 o'clock flower based on parental genotypes and phenotypes, Punnett squares can be used. By analyzing the genotypes of the parents, the possible phenotypes of the offspring can be determined.
Step-by-step explanation:
In order to predict the leaf color in the 4 o'clock flower based on parental genotypes and phenotypes, we can use Punnett squares. The Punnett square allows us to determine the possible genotypes and phenotypes of the offspring. For example, if the parental genotypes are PP (purple flowers) and ww (white flowers), the Punnett square would show that all of the offspring would have the genotype Pw, resulting in pink flowers.