The relationship between genetics and environment is described by the concept of gene-environment interaction. Genetics provide the biological blueprint for organisms, influencing traits such as phenotype, behavior, and susceptibility to diseases. However, environmental factors—like nutrition, climate, and social interactions—can significantly modify gene expression and overall development. This interplay can explain variations observed within populations and emphasizes how both inherent genetic predispositions and external influences collaboratively shape individual outcomes in health and behavior.