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?(1 point)

Question

Responses

If a plant has purple flowers, then its genotype must be Pp.
If a plant has purple flowers, then its genotype must be Pp .
PP.
If a plant has purple flowers, then its genotype must be PP .

If a plant has white flowers, then its genotype must be pp.
If a plant has white flowers, then its genotype must be Pp.
If a plant has white flowers, then its genotype must be Pp .

If a plant has purple flowers, then its genotype must be ,.

Answer 1

In pea plants, since the allele for purple flowers (P) is dominant over the allele for white flowers (p), we can conclude the following:

• If a plant has white flowers, then its genotype must be pp (because only the homozygous recessive genotype will result in the white phenotype).

• If a plant has purple flowers, its genotype could be either PP (homozygous dominant) or Pp (heterozygous). Therefore, we cannot definitively conclude the exact genotype of a purple-flowered plant based solely on its phenotype.

So, the appropriate conclusions are:

1. If a plant has white flowers, then its genotype must be pp.
2. If a plant has purple flowers, then its genotype could be either PP or Pp.

To summarize: The title question about purple flowers might conclude that the genotype must be Pp is incorrect, because purple flowers can also be expressed by the PP genotype.