Question

In Mendel’s experiments, what proportion of F 2 plants were tall?

all of them

three-fourths

one-half

one-fourth

Answer 1

In Mendel's experiments with pea plants, when he crossed homozygous tall plants (TT) with homozygous short plants (tt), all the F1 generation plants were tall (Tt). When he self-fertilized the F1 plants (Tt x Tt), the F2 generation had a phenotypic ratio of 3 tall plants to 1 short plant.

Therefore, the proportion of F2 plants that were tall is three-fourths, or 75%.

So the correct answer is **three-fourths**.