In Pea Plants,the Gene for Round Seed (R)is Dominant,and Wrinkled

Multiple Choice

In pea plants,the gene for round seed (R) is dominant,and wrinkled seeds (r) are recessive.The endosperm of the pea is also either starchy,a dominant gene (S) ,or waxy (s) .What CANNOT be said of a cross between two parents that are heterozygous for both traits?

A) It is possible to secure offspring that are homozygous for both dominant genes.
B) It is possible to secure offspring that are homozygous for both recessive genes.
C) It is possible to secure offspring that are homozygous for one dominant gene,such as round seed,and homozygous recessive for the other recessive waxy gene.
D) It is possible to secure offspring that are heterozygous for both genes.
E) It is impossible to secure offspring that are homozygous for both dominant genes.