In pea plants, tall plants are dominant over short, and green pods are dominant over yellow. If you crossed true-breeding tall, green-podded plants with true-breeding short, yellow-podded plants, and then crossed the F1 individuals among themselves, what proportion of the F2 offspring would you expect to be tall and yellow-podded?
A) 1/4
B) 1/16
C) 3/16
D) 3/4
E) 9/16

Question

Quizplus · Accepted Answer

The F1 generation, being a cross between true-breeding tall, green-podded plants (TTGG) and true-breeding short, yellow-podded plants (ttgg), would all be heterozygous tall and green-podded (TtGg). Crossing these F1 individuals (TtGg x TtGg) would result in a 9:3:3:1 ratio for the F2 generation, according to Mendelian genetics. The tall, yellow-podded phenotype corresponds to the 3/16 portion of this ratio, as it combines the dominant trait from one gene (tall) with the recessive trait from the other (yellow pods).

In Pea Plants, Tall Plants Are Dominant Over Short, and Green