In Mendel's peas, yellow seeds are dominant to green. A pure-breeding yellow plant is crossed with a pure-breeding green plant. All of the offspring are yellow. If one of these yellow offspring is crossed with a green plant, what will be the expected proportion of plants with green seeds in the next generation?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Question

Quizplus · Accepted Answer

The yellow offspring from the first cross are heterozygous (Yy). Crossing a heterozygous yellow plant (Yy) with a green plant (yy) will result in a 1:1 ratio, or 50% yellow (Yy) and 50% green (yy) offspring.

In Mendel's Peas, Yellow Seeds Are Dominant to Green