In peas, Tall (T) is dominant to short (t), Round (R) is dominant to wrinkled (r) and Yellow pea color (Y) is dominant to green (y). A tall plant with round, yellow peas (Plant 1) was crossed to a short plant with round green peas (Plant 2) and the resulting progeny exhibited the following phenotypes: 310 Tall Round Yellow
105 Tall Wrinkled Yellow
290 Short Round Yellow
100 Short Wrinkled Yellow

Which of the following statements is TRUE?

a. The mating between Plant 1 and Plant 2 is a dihybrid cross.
b. The mating between Plant 1 and Plant 2 is a monohybrid cross.
c. The mating between Plant 1 and Plant 2 is a trihybrid cross.
d. The genotype of Plant 1 is Tt Rr YY.
e. The genotype of Plant 2 is tt Rr YY.