Question

A gardener crosses tall true–breeding pea plants with short true–breeding ones. Tall plants are dominant to short ones. He collects the seeds to grow F1 plants and then allows them to self–pollinate to form an F2 generation. Which of the following describes the traits of the offspring correctly?

1.Three–fourths of the F1 and one–half of the F2 plants will be tall.
2.All of the F1 and three–fourths of the F2 plants will be tall.
3.Three–fourths of the F1 and all of the F2 plants will be tall.

Answer 1

But all of the F1 should be tall because the tall plants are dominant originally

F2 will have 3/4 to be tall, assuming this genetic case is determined by only one factor, like Aa

Answer 2

all of F1 and 3/4 of the F2 plants will be tall