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**(1 point)

Question

Responses

some round and some wrinkled

slightly wrinkled

round

wrinkled

Answer 1

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

Since R (round) is dominant over r (wrinkled), any plant with at least one dominant allele (R) will display the round phenotype.

Let's set up the Punnett square for a cross between two heterozygous pea plants (Rr x Rr):

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

From the Punnett square, we can see the possible genotypes of the offspring:

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

The phenotypes associated with these genotypes are:

• RR = round
• Rr = round
• rr = wrinkled

Since both RR and Rr result in the round phenotype, the overall outcome for the offspring is that they will show the round phenotype.

Thus, the phenotype of a pea plant with genotype Rr is:

Round