Pea plants are tall if they have the genotype TT or Tt, and they are short if they have genotype tt. A tall plant is mated with a short plant.
Which outcome below would indicate that the tall parent plant was heterozygous?

a. The ratio of tall offspring to short offspring is 1:1.
b. The ratio of tall offspring to short offspring is 1:2.
c. The ratio of tall offspring to short offspring is 2:1.
d. none of the above