Science Biology Help!!!!!!

Question

Pure-breeding pea plants with the dominant long-stem trait were crossed with pure-breeding pea plants with short stems. The F1 generation was allowed to self-pollinate. If the long-stemmed offspring of the F2 generation are test crossed, what fraction of their offspring are expected to have short stems?

a. 3/4

b. 1/2

c. 1/3

d. 1/4

Answer 1

The F1 generation would be Tt

Tt x Tt produces:

1/4 TT

1/2 Tt

1/4 tt

so 1/4 of the F2 would be short (tt)  and 3/4 would be tall (TT and Tt)

the answer is d.

Answer 2

d it always starts as 1/4 then goes smaler as the progeny continues