Assume that you have two lines of plants: one is A/A; B/B, the other is a/a; b/b. You cross the two and then self the F1 plants. With respect to these two genes:
a. What is the probability that an F2 plant will obtain one-half its alleles from one grandparent and one-half from the other?
b. What is the probability that an F2 plant will obtain all its alleles from a single grandparent?