In snapdragons, red flower color (R) is incompletely dominant over white flower color (r); the heterozygotes produce pink flowers. A red snapdragon is crossed with a white snapdragon, and the F1 are intercrossed to produce the F2.

(a) Give the genotypes and phenotypes of the F1 and F2, along with their expected proportions.

(b) If the F1 are backcrossed to the white parent, what will the genotypes and phenotypes of the offspring be?

(c) If the F1 are backcrossed to the red parent, what are the genotypes and phenotypes of the offspring?