The interaction between environment and genetics is a fundamental principle in biology, as both genes and the surrounding environment influence the traits, behavior, and health of living organisms. Genetics determines fundamental characteristics such as color, height, and susceptibility to certain diseases, while environmental factors affect the expression of these genes through nutrition, climate, social conditions, and lifestyle. This interaction explains the variation of traits among individuals of the same species. For example, an individual may have a genetic predisposition for tall stature, but poor nutrition and unfavorable environmental conditions can prevent them from reaching their potential height. Similarly, some genetic diseases may manifest or worsen under certain environmental influences, such as exposure to pollutants or psychological stress. Understanding the relationship between genetics and the environment helps scientists and professionals in health, agriculture, and applied medicine develop strategies for disease prevention, improve crop productivity, and promote public health. Recent studies in genetics and environmental sciences have shown that environmental changes can sometimes affect gene expression in ways that may be heritable, a concept known as epigenetics.