Pea plants have two traits: round or wrinkled seeds, and tall or short stems.

Round and tall are dominant, while wrinkled and short are recessive.

Two parent plants are crossed. One is heterozygous for both traits, the other is homozygous dominant for seed shape, and homozygous recessive for stem height.

What are the genotypes of the two parent plants? Use R or r for seed shape, and T or t for stem height.