A phenotype is the set of observable characteristics or traits of an organism. These traits include physical appearance (such as height, eye color, and hair color), developmental processes, biochemical and physiological properties, behavior, and the products of behavior. The phenotype results from the interaction of an organism's genetic makeup (genotype) and environmental influences. This means that while the genotype provides the genetic potential, environmental factors such as diet, lifestyle, and external conditions also shape the phenotype. For example, identical twins with the same genotype can have different phenotypes due to differing environments. Phenotypes can also include measurable laboratory traits like blood type or hormone levels
. In summary, phenotype is the observable expression of an organism's genes as modified by environmental factors.
