How can population genetics be used in medicine?

In the context of Darwinian medicine, population genetics serves as a foundational tool for understanding the evolutionary basis of health and disease. By applying mathematical models to the frequencies of alleles and genetic types within populations, researchers can better understand, prevent, and treat human disease.12

Population genetics is used in medicine in several key ways:

• Identifying Disease Genes: Researchers use evolutionary modeling to search for genes that cause disease and to identify chromosome locations subjected to strong recent selection, such as those influencing lactase persistence in adults.2
• Understanding Pathogen Evolution: Rigorous mathematical models derived from population genetics are essential for tracking antibiotic resistance and understanding the virulence of infectious organisms, which informs public health policies.2
• Tracing Genetic Heritage: Genetic data is used to trace the specific source of infections and the genetic heritage of individuals, providing insights into susceptibility and disease distribution.2
• Foundational Epidemiology: Population genetics provides the basis for genetic epidemiology, which studies how genetic and environmental factors interact to influence human traits and disease susceptibility across populations.3