Question

One pea plant that is heterozygous with regard to flower color (purple is dominant to white) is crossed to a plant with white flowers. What are the predicted outcomes of genotypes and phenotypes for the offspring?

Answer 1

When a heterozygous pea plant (Pp) with purple flowers is crossed with a plant with white flowers (pp), the predicted genotypes for the offspring are Pp and pp. The predicted phenotypes of the offspring are three-quarters purple flowers and one-quarter white flowers.

Step-by-step explanation:

When a heterozygous pea plant (Pp) with purple flowers (dominant) is crossed with a plant with white flowers (pp), the predicted outcomes of genotypes and phenotypes for the offspring can be determined using a Punnett square. Let's represent the dominant purple allele as P and the recessive white allele as p. In this cross, the predicted genotypes of the offspring will be Pp (heterozygous) and pp (homozygous recessive). As for the predicted phenotypes, three out of four (75%) of the offspring are expected to have a purple flower phenotype, while one out of four (25%) is expected to have a white flower phenotype.