In pea plants, the allele for round peas, R, is dominant over the allele for wrinkled peas, r. What is the phenotype of a pea plant with genotype Rr? **Make a punnett square for help**
To make a Punnett square, we will cross a pea plant with genotype Rr (round peas) with a pea plant with genotype rr (wrinkled peas).
| R | r |
--------------
R | RR | Rr |
--------------
r | Rr | rr |
The Punnett square shows that there are two possible genotypes in the offspring: 50% RR (round peas) and 50% Rr (round peas).
Since the allele for round peas (R) is dominant over the allele for wrinkled peas (r), the phenotype of a pea plant with genotype Rr is round peas.