In pea plants, the traits for plant height, seed shape, and pod color are coded

Question

In pea plants, the traits for plant height, seed shape, and pod color are coded by genes with two alleles. The allele for tall plants (Tis dominant over the allele for short plants (t), the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r), and the allele for green pods (G) is dominant over the allele for yellow pods (g) A plant that is heterozygous for all three traits is crossed with a plant that is short, heterozygous for seed shape, and is homozygous with green pods. How many phenotypes are possible from this cross? Number Number of phenotypes Tools x 10

Explanation / Answer

Given that Plant heterozygous for all the three traits is crossed with is crossed with a plant that is short, heterozygous for seed shape and is homozygous with green pods.

Genotype of Plant heterozygous for all the three traits would be, TtRrGg. Genotype of plant that is short, heterozygous for seed shape and is homozygous with green pods is, ttRrGG.

Cross between these two gives, (TtRrGg * ttRrGG) 12 distinct phenotypes (Punnett square analysis).

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