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. All of the offspring are short.
• B. All of the offspring are tall.
• C. The ratio of tall offspring to short offspring is 3:1.
• D. There is not enough information to answer the question.
• E. The ratio of tall offspring to short offspring is 1:1.