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.

Question

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

Answer 1

B) 9 colorful : 7 white