Question

You cross peas having round seeds and yellow leaves to peas with wrinkled seeds and green leaves. In the F1 generation you observe that all plants have round seeds with yellow leaves. Which traits are dominant?

Answer 1

In pea plants, round seed shape (R) is dominant to wrinkled seed shape (r) and yellow peas (Y) are dominant to green peas (y). The possible genotypes and phenotypes for a cross between RrYY and rrYy are RrYY, RrYy, rrYY, rrYy with the possible phenotypes being round yellow, round green, wrinkled yellow, and wrinkled green. A 4x4 Punnett square would be needed to represent all the possible combinations.

Step-by-step explanation:

In pea plants, round seed shape (R) is dominant to wrinkled seed shape (r) and yellow peas (Y) are dominant to green peas (y).

To determine the possible genotypes and phenotypes for the given cross (RrYY and rrYy), we can use a Punnett square analysis. The possible genotypes are RrYY, RrYy, rrYY, rrYy. The possible phenotypes are round yellow, round green, wrinkled yellow, and wrinkled green.

To complete the Punnett square, you would need a 4x4 grid to represent all the possible combinations.