Let's fill in the Punnett square.
It shows that there are 16 possibilities of genotypes. The genotypes carry the following phenotypes:
> Tall and Yellow = 1 TTYY, 4 TtYy, 2 TTYy, 2 TtYY = 9/16
> Tall and Green = 2 Ttyy, 1 TTyy = 3/16
> Short and Yellow = 2 ttYy, 1 ttYY = 3/16
> Short and Green = 1 ttyy = 1/16
ANSWER: 9/16 Tall and yellow, 3/16 tall and green, 3/16 short and yellow, and 1/16 short and green.