Mendel Crossed True-Breeding Plants That Had Yellow Peas with Plants

Multiple Choice

Mendel crossed true-breeding plants that had yellow peas with plants that had green peas. The resulting plants all had yellow peas. An F₁ cross resulted in three-quarters of the plants having yellow peas and one-quarter of the plants having green peas. What does this tell you about the alleles for colour?

A) Green was the dominant colour.
B) Yellow was the recessive colour.
C) Yellow was the dominant colour.
D) Yellow was usually the dominant colour, but sometimes green could be dominant.