n 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?
slightly wrinkled
Phenotype is how the plant looks. If we have Rr that means we have a dominant gene of smooth (R) . So this dominant gene covers the recessive gene so we can only observe the plant is smooth.
