In garden peas, a single gene controls stem length. The recessive allele (t) produces short stems when homozygous. The dominant allele (T) produces long stems. A short-stemmed plant is crossed with a heterozygous long-stemmed plant. Which of the following represents the expected phenotypes of the offspring and the ratio in which they will occur?单项选择题

A

1 long-stemmed plant: 1 short-stemmed plant

B

Short-stemmed plants only

C

3 long-stemmed plants: 1 short-stemmed plant

D

Long-stemmed plants only

E

1 long-stemmed plant: 3 short-stemmed plants

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