Transgenic mouse models are genetically modified mice that have had specific genes added, deleted, or altered to study the effects of these genetic changes on various aspects of biology or disease. These models are often used to investigate the role of specific genes in development, physiology, and disease processes. Transgenic mouse models have been instrumental in advancing our understanding of a wide range of human conditions, including cancer, neurodegenerative diseases, and cardiovascular disorders. These models are a valuable tool for both basic scientific research and the development of new therapeutic approaches.