In his classic experiments on pea plants Mendel did not use?

1. Seed color

2. Pod length

3. Seed shape

4. Flower position

How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?

Phenotype of an organism is the result of:

1. mutations and linkages

2. cytoplasmic effects and nutrition

3. environmental changes and sexual dimorpgism

4. genotype and environment interactions

In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F₂ generation of the cross RRYY x rryy?