Question

1.If you cross two pea plants that are heterozygous for flower color (Pp), what is the percent chance that the offspring will be white? 2.Round peas (R) are dominant to wrinkled peas (r). If a pea plant with the genotype Rr is crossed with a pea plant with wrinkled peas, what are the odds that the offspring will have wrinkled peas?

Answer 1

1. There is a 25% chance that the flowers will be white.

2. There is a 50% chance that the peas will be wrinkled.

Answer 2

The principle of dominance. The gene for purple flowers is dominant, while the gene for white flowers is recessive. We know this because both flowers are homozygous, meaning their genes are the same