Three of the traits that Mendel studied were flower color, seed shape, and seed color. He found that flowers could be purple or white, seeds could be round or wrinkled and their color could be yellow or green. The alternative phenotypes of each trait proved to be governed by a single locus with one allele always dominant to the other; thus purple (P) was dominant to white (p), round (W) was dominant to wrinkled (w), and yellow (G) was dominant to green (g). The three loci assorted independently. A cross was made between a pure-breeding white, round, green variety and a pure-breeding purple flowered, wrinkled, yellow one. The F1 progeny were self-pollinated to produce an F2 population.

a. What are the genotypes of the pure-breeding parents and of the F1?

b. What will be the phenotypic ratio expected in the F2? Show your work?