Final answer:
A phenotype can consist of observable as well as non-expressed characteristics. The genotype refers to the genetic makeup of an organism and includes the alleles that determine the phenotype.
Step-by-step explanation:
A phenotype can consist of observable as well as non-expressed characteristics. The phenotype refers to the physical traits or characteristics of an organism that can be observed or measured, such as hair color, eye color, and height. On the other hand, the genotype refers to the genetic makeup of an organism and includes the alleles that determine the phenotype. It is important to note that not all characteristics of an organism are visible or expressed, as some may be determined by non-expressed alleles in the genotype.