The term for the genetic makeup of an organism in a specific environment is referred to as its genotype. The genotype encompasses all the genetic information inherited from an organism's parents, determining traits and characteristics. It interacts with the environment, influencing phenotypic expression or observable traits. Understanding genotype is crucial in fields like genetics, breeding, and evolutionary biology, as it helps explain how organisms adapt to their surroundings, respond to environmental changes, and undergo natural selection processes that shape populations over time.