In the Common Daisy, Genes a and B Control Flower

Multiple Choice

In the common daisy, genes A and B control flower color. Both genes have a dominant allele (A or B) and a recessive allele (a or b) . At least one copy of each dominant allele is required for flowers to be colorful instead of white.
-Predict the phenotypic ratio of the F₂ progeny of a cross between two white-flowered plants, one homozygous for A and the other homozygous for B.

A) 3 colorful : 1 white
B) 9 colorful : 7 white
C) 9 white : 7 colorful
D) 15 white : 1 colorful
E) 15 colorful : 1 white