The color of a person's hair is an example of which of the following?

The color of a person's hair is classified as a phenotype. Phenotype refers to the observable characteristics or traits of an individual, which result from the interaction of their genotype (the genetic makeup) with the environment. Hair color, being a visible trait, exemplifies how genetic factors and possibly environmental influences contribute to an individual's appearance.

In contrast, the genome encompasses the complete set of genetic material present in an organism, including all of its genes, rather than specific observable traits. Sex-link inheritance pertains to traits that are linked to sex chromosomes and typically affects how certain traits are passed down and expressed between genders, which does not apply directly to the general trait of hair color. Genotype refers to the specific alleles or genetic makeup associated with a trait, but it does not represent the observable characteristics themselves. Thus, hair color being an observable trait makes it a clear example of a phenotype.