In radishes, long or round are homozygous forms of an incompletely dominant gene, and oval is the phenotype of the heterozygote. If a long radish is crossed with a round radish, which of the following phenotypic ratios of the F2 generation is correct?
A. all round
B. all oval
C. 1/2 long, 1/2 oval
D. 1 long, 2 oval, 1 round
E. 1/2 oval, 1/2 round
Answer: D
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