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.
The phenotype of a pea plant with genotype Rr is round peas.
A Punnett square for the cross between two pea plants, one with genotype RR (round peas) and the other with genotype rr (wrinkled peas), would look as follows:
R r
R | RR | Rr |
-------------------
r | Rr | rr |
As can be observed from the Punnett square, two possible genotypes can result from the cross: RR and Rr. Both of these genotypes result in round peas, indicating that the dominant allele R is expressed in the phenotype.
Those weren't options
Some wound and some wrinkled
slightly wrinkled
round
wrinkled
oh nvm
To determine the phenotype of a pea plant with genotype Rr, we can use a Punnett square. A Punnett square is a simple diagram used to predict the possible genotypes and phenotypes of the offspring of a genetic cross.
In this case, we have the dominant allele for round peas, R, and the recessive allele for wrinkled peas, r. The genotype Rr represents a heterozygous individual, which means it carries both alleles for the trait.
To create a Punnett square, we need to write the possible gametes (sperm or egg cells) of each parent along the corresponding sides of the square. Since the genotype of the pea plant in question is Rr, both its gametes will carry one copy of the dominant allele (R) and one copy of the recessive allele (r).
Let's create a Punnett square for the cross:
R r
----------------
R | RR Rr
----------------
r | Rr rr
In the Punnett square, each box represents a potential offspring genotype. The combinations in each box represent the possible combinations of alleles from the parent gametes. In this case, we have four possible genotypes: RR, Rr, Rr, and rr.
Now, to determine the phenotype, we need to look at the dominant and recessive alleles. The allele for round peas (R) is dominant over the allele for wrinkled peas (r). Therefore, if an individual has at least one dominant allele (R), it will have the round pea phenotype.
From the Punnett square, we can see that out of the four possible genotypes, three have an R allele (RR, Rr, and Rr). This means that the phenotype of a pea plant with genotype Rr is round peas.
So, the phenotype of a pea plant with genotype Rr is round peas.