Monohybrid Cross Problem Set

Problem 3: Mendel's "Experiment 1"

In Mendel's "Experiment 1," true-breeding pea plants with spherical seeds were crossed with true-breeding plants with dented seeds. (Spherical seeds are the dominant characteristic.) Mendel collected the seeds from this cross, grew F1-generation plants, let them self-pollinate to form a second generation, and analyzed the seeds of the resulting F2 generation. The results that he obtained, and that you would predict for this experiment are:

A.	1/2 the F1 and 3/4 of the F2 generation seeds were spherical.
B.	1/2 the F1 and 1/4 of the F2 generation seeds were dented.
C.	All of the F1 and F2 generation seeds were spherical.
D.	3/4 of the F1 and 9/16 of the F2 generation seeds were spherical.
E.	All the F1 and 3/4 of the F2 generation seeds were spherical. All of the F1 plants were true hybrids with a phenotype of Ss. The recessive trait reappears in the F2 generation.