In pea plants, the allele for purple flowers, P, is dominant over the allele for white flowers,

Question

p. Which conclusion about phenotype and genotype is possible? (1 point)
O If a plant has purple 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 white flowers, then its genotype must be pp.

Answer 1

The correct conclusion is:

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

This is because the phenotype of white flowers can only be expressed when the plant has two recessive alleles (pp), since the purple flower allele (P) is dominant over the white flower allele (p). Therefore, a plant with white flowers cannot have a dominant allele and must be homozygous recessive (pp).