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)
If a plant has purple flowers, then its genotype must be Pp
If a plant has purple flowers, then its genotype must be PP
OIf 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 PP or Pp.
The correct conclusion about phenotype and genotype in pea plants is: If a plant has white flowers, then its genotype must be pp.
The correct conclusion about phenotype and genotype in pea plants is "If a plant has white flowers, then its genotype must be pp." This is because the allele for purple flowers, P, is dominant over the allele for white flowers, p. Therefore, a plant must have a homozygous recessive genotype (pp) to exhibit the white flower phenotype.
To arrive at this conclusion, you need to understand the concept of dominance in genetics. Dominant alleles are expressed in the phenotype, whereas recessive alleles are only expressed if there are two copies of the recessive allele (homozygous recessive genotype). In this case, the dominant allele for purple flowers (P) masks the expression of the recessive allele for white flowers (p).
To determine genotype based on phenotype, you can use Punnett squares or crosses between different plants with known genotypes. By observing the offspring's phenotypes, you can then deduce the possible genotypes. In this scenario, if a plant has white flowers, it is clear that the plant must have two copies of the recessive allele (pp) as the dominant allele (P) would result in purple flowers.