Reference no: EM133550105

Question: In a certain species of petunia, flowers occur in three colors: white, yellow and red. A pure-breeding white plantis mated with a pure-breeding yellow and all of the F, are red plants. When the red F, plants are crossed again, theF, occur in the ratio 9 red: 3 yellow: 4 white.

a. How many gene pairs control the flower color phenotype?

b. What is the name for this type of interaction?

c. What is the genotype of the yellow parent? (Use symbols of your own choosing.)

d. What is the genotype of the white parent?

e. What is the genotype of the F, plants?

f. What are the genotypes and associated phenotypes in the F,?

g. Propose a biochemical pathway showing intermediates in the pathway leading to the synthesis of pigment(s) and clearly indicating which steps are controlled by each gene.