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

5 answers

In pea plants, the dominant allele for purple flowers is represented by "P," while the recessive allele for white flowers is represented by "p."

From this information, we can draw the following conclusions about phenotype and genotype:

  1. Phenotypes:

    • Any pea plant that has at least one "P" allele (genotypes PP or Pp) will exhibit the purple flower phenotype.
    • A pea plant must have the genotype "pp" to exhibit the white flower phenotype.
  2. Genotypes:

    • Phenotype Purple Flowers: This can arise from two possible genotypes:
      • Homozygous dominant: PP
      • Heterozygous: Pp
    • Phenotype White Flowers: This phenotype can only occur with the homozygous recessive genotype:
      • Homozygous recessive: pp

In summary:

  • If a pea plant has purple flowers, its genotype could either be PP or Pp.
  • If a pea plant has white flowers, its genotype must be pp.

This illustrates the relationship between genotype (the genetic makeup) and phenotype (the observable traits).

if a plant has white flowers, then its genotype must be 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 purple flowers, then its genotype must be Pp

Let's clarify the correct statements regarding the genotype and phenotype of pea plants with regards to the alleles for flower color:

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

    • True: White flower color is only expressed when the genotype is homozygous recessive (pp).
  2. If a plant has purple flowers, then its genotype must be PP.

    • False: A plant with purple flowers can have either the homozygous dominant genotype (PP) or the heterozygous genotype (Pp).
  3. If a plant has white flowers, then its genotype must be Pp.

    • False: As mentioned earlier, a plant with white flowers must be homozygous recessive (pp) and cannot be heterozygous (Pp) since that would express the dominant purple phenotype.
  4. If a plant has purple flowers, then its genotype must be Pp.

    • False: A plant with purple flowers can be either homozygous (PP) or heterozygous (Pp).

In summary:

  • The true statement is that if a plant has white flowers, then its genotype must be pp.
  • A plant with purple flowers could have either the genotype PP or Pp.
so what is the answer

Based on your original statements, here are the correct evaluations:

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

    • True
  2. If a plant has purple flowers, then its genotype must be PP.

    • False (it could be PP or Pp)
  3. If a plant has white flowers, then its genotype must be Pp.

    • False (must be pp)
  4. If a plant has purple flowers, then its genotype must be Pp.

    • False (it could be PP or Pp)

Conclusion: The only correct statement is: If a plant has white flowers, then its genotype must be pp.