Which answer illustrates an example of a phenotype?

A phenotype refers to the observable traits or characteristics of an organism that result from the interaction of its genotype (the genetic makeup) and its environment. In the context of this question, "white flowers" is a specific trait that can be seen and measured, making it a clear example of a phenotype.

In terms of the other choices, the genotypic representations (PP, pp, and Pp) indicate the genetic composition of an organism but do not directly describe observable traits. "PP" and "pp" reflect homozygous gene pairs, while "Pp" represents a heterozygous gene pair. These genetic notations provide information about the potential traits an organism may express but do not denote what those traits actually look like, hence they are not phenotypes. The only option that provides a direct description of a trait is "white flowers," which can be visually assessed.