Define Genotypes and Phenotypes Quick Check 1 of 41 of 4 Items Question In pea plants, the allele for purple flowers, P, is dominant over the allele for white flowers, p. Which conclusion about phenotype and genotype is possible?

Answer 1

In pea plants, since the allele for purple flowers (P) is dominant over the allele for white flowers (p), we can draw several conclusions about phenotype and genotype:

1. Phenotypes: A plant with at least one dominant allele (P) will have purple flowers. This means that both homozygous dominant (PP) and heterozygous (Pp) plants will display the purple flower phenotype. Only plants that are homozygous recessive (pp) will have white flowers.

2. Genotypes: The genotypes of the plants can be as follows:

   • PP: Homozygous dominant (purple flowers)
   • Pp: Heterozygous (purple flowers)
   • pp: Homozygous recessive (white flowers)

Therefore, from a phenotype perspective, if a pea plant has purple flowers, its genotype could be either PP or Pp, while if it has white flowers, it must be pp.