Here's why:
* Phenotype: The observable characteristics of an organism, including its physical appearance, development, and behavior. These characteristics are determined by both the organism's genetic makeup (genotype) and its environment.
* Genotype: The genetic makeup of an organism, represented by the specific alleles (versions of genes) it carries.
While "phenotype" refers to the expression of genes, "genotype" refers to the underlying instructions themselves.
Let me know if you'd like more examples or explanations!