Question

hair color, height, eye color and freckles are examples of human traits. what do we call the physical expression of the genetic material of an organism?
phenotype
heredity
genotype
genetics

Explanation:

The question describes physical traits (hair color, height, etc.) that are observable expressions of an organism's genetic material. This matches the definition of phenotype, which refers to the physical characteristics resulting from the interaction of genotype and environment. Heredity is the passing of traits, genotype is the genetic makeup, and genetics is the study of heredity.

Answer:

phenotype