Key gene plays an important role in regulating various physiological and pathological processes. Some synonyms for key gene include: master gene, pivotal gene, critical gene, essential gene, central gene, and fundamental gene. These terms emphasize the crucial role that certain genes play in determining the development, function, and survival of an organism. Key genes typically act as initiators or modulators of complex signaling pathways that coordinate cellular activities. Identifying and studying key genes is critical for understanding the mechanisms underlying human diseases and for developing new therapies. By uncovering the functions of key genes, researchers are unlocking the secrets of life and discovering new opportunities to improve human health.