3. Tomato plants can have either green stems or purple stems. The allele for green stems (G) is dominant to the allele for purple stems (g). A gardener crosses a tomato plant heterozygous for stem colour with a purple-stemmed tomato plant. 1. What are the genotypes of the parents? 2. Create a Punnett square for the cross. 3. What is the probability of getting a plant with the genotype Gg? 4. What is the probability of getting a plant with a green stem?
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