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 punnet square for help**

Question

Responses

wrinkled
wrinkled

some round and some wrinkled
some round and some wrinkled

slightly wrinkled
slightly wrinkled

round

Answer 1

To determine the phenotype of a pea plant with the genotype Rr, we can create a Punnett square.

Here's how the Punnett square would look:

      R       r
   ----------------
R |   RR    |   Rr   |
   ----------------
r |   Rr    |   rr   |
   ----------------

From the Punnett square, we see the following genotypes from crossing Rr (one round allele and one wrinkled allele):

• 1 RR (homozygous dominant)
• 2 Rr (heterozygous)
• 1 rr (homozygous recessive)

Since the allele for round peas (R) is dominant, both RR and Rr genotypes will display the round phenotype, while only the rr genotype will display the wrinkled phenotype.

Phenotypic ratios:

• Round (RR and Rr): 3
• Wrinkled (rr): 1

Therefore, in a plant with the genotype Rr, the phenotype is round.

The correct response is:

round