You identified a biochemical pathway that produces pigment in a flower. The pathway involves 27 converting a precursor compound into the pignment. Two genes work one after the other to carry out the reactions using the precursors produced by the other gene. When you perform a dihybrid cross, what is the phenotypic ratio (purple:white) you expect to see? (A) 9:7 (B) 15:1 (C) 9:3:3:1 (D) 12:3:1 (E) 9:6:1