Let P=purple flowers and p=white, and T=tall plants and t=dwarf. What are the genotypes of the gametes that could be produced by a plant that is heterozygous for both traits
a. PpTt only
b. both Pp and Tt
c. P,p,T, and t
d. PT, Pt, pT, and pt
e. Tt, TT, tt, Pp,PP, and pp
Answer: d. PT, Pt, pT, and pt