Question

Some sweet-pea plants have purple flowers and other plants have white flowers. A homozygous variety of pea that has purple flowers is crossed with a homozygous variety that has white flowers. All the F1 have purple flowers. When these F1 are self-fertilized, the F2 appear in a ratio of 9/16 purple to 7/16 white. Show your work.
A) Give genotypes for the purple and white flowers in the F2 generation.

B) Draw a hypothetical biochemical pathway to explain the production of purple and white flowers in

sweet peas.

Answer 1

Answer:

Some sweet-pea plants have purple flowers and other plants have white flowers. A homozygous variety of pea that has purple flowers is crossed with a homozygous variety that has white flowers. All the F1 have purple flowers. When these F1 are self-fertilized, the F2 appear in a ratio of 9/16 purple to 7/16 white. Show your work.

A) Give genotypes for the purple and white flowers in the F2 generation.

PP x ww= Pw, Pw, Pw, Pw F1 generation

Pw x Pw= PP. Pw, Pw and ww F2 generation

3 purple and 1 white flower

B) Draw a hypothetical biochemical pathway to explain the production of purple and white flowers in  sweet peas.

Explanation: