In mendel's experiments on seed color in pea plants, when a dominant yellow seed-bearing plant was crossed with a recessive green seed-bearing plant, what was the approximate phenotypic ratio among the F2 generation
a. 1 yellow: 3 green
b. 1 yellow: 1 green
c. 3 yellow: 1 green
d. all yellow
e. 9:3:3:1
Answer: c. 3 yellow: 1 green