Question 1:
The correct response is:
If a plant has white flowers, then its genotype must be pp.
This is true because white flowers are produced only when the plant has two recessive alleles, as the presence of at least one dominant allele (P) would result in purple flowers.
Question 2:
The correct response is:
an observable trait.
Phenotype refers to the observable characteristics or traits of an organism, which can be influenced by both genetic and environmental factors.
Question 3:
The response seems to be cut off. The appropriate definition for an allele is:
a variant form of a gene.
Alleles are different versions of a gene that can produce different traits in an organism (e.g., different alleles for flower color may produce purple or white flowers in pea plants).
If you'd like to provide additional options or clarify this question, feel free!