In tomatoes, the gene for red fruit color dominates over the gene for yellow color. Homozygous red-fruited plants were crossed with yellow-fruited ones.
a) Name the genotype of yellow plants in words.
b) Describe the percentage of fruit by color in F1.
c) Describe the percentage of fruit by color in F2.
d) What result can be obtained from crossing red-fruited hybrids from F2 with hybrids from F1?
e) What result can be obtained from crossing yellow-fruited plants from F2 with each other?
Answer: re-homozygote / 100% red / 75% red, 25% yellow / 100% red or 75% red, 25% yellow / 100% yellow.
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