Plant a and plant b are heterozygous for a gene that expresses their tall trait (tt). upon crossing, what is expected in the offspring, assuming random chromosome segregation?

The answer is 75% of offspring will be tall and 25% of offspring will be short.

If:
T - the dominant allele for tall trait
t - the recessive allele for short trait

Then:
TT - dominant homozygote (tall)
Tt - heterozygote (tall)
tt - recessive homozygote (short).

In the cross of two heterozygotes Tt x Tt 75% of offspring will be tall and 25% of offspring will be short:

Parental generation:        Tt     x     Tt
Offspring generation:   TT    Tt    Tt    tt

Thus, 3 out of 4 (=3/4=75%) offspring are tall (1 TT and 2 Tt) and 1 out of 4 (=1/4=25%) offspring is short. Speaking of genotypes, 1 out of 4 (=1/4=25%) is dominant homozygote (TT), 2 out of 4 (=2/4=50%) is heterozygote (Tt), and 1 out of 4 (=1/4=25%) is recessive homozygote (tt).

Is their a picture that goes along with it? ?