Question

In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (Tt) parent plants? (Hint: You may want to complete a Punnett square.)
1) 25 percent tall, 50 percent intermediate, 25 percent short
2)50 percent tall, 25 percent intermediate, 25 percent short
3)100 percent intermediate
4)25 percent tall, 75 percent intermediate

Answer 1

You'll need to use punnett squares for that
     T        t

T    TT    Tt

t     Tt       tt

25%TT, 50%Tt, 25%tt

So it'll be 1) 25 percent tall, 50 percent intermediate, 25 percent short

Answer 2

1) 25% tall, 50% intermediate, 25% short
By completing a punnet square, you get the following answers, TT, Tt, Tt, tt. Tt represents the intermediate and because you ended up with two Tt's you get 50% intermediate. You end with one TT resulting in 25% tall. Finally, tt represents short which you received one on, 25% short.