What does polygenic mean?
Polygenic describes something influenced by multiple genes rather than by a single gene. In genetics, the term is especially important for understanding traits and conditions that vary widely among individuals, such as height, skin pigmentation, blood pressure, diabetes, and many common diseases. A polygenic trait does not arise from one isolated genetic change; instead, it results from the combined effects of numerous genetic variants, usually interacting with environmental influences as well. The word is also commonly used in medical research when describing inherited susceptibility or risk. Because polygenic conditions are more complex than single-gene conditions, identifying associated genes does not necessarily determine a person’s outcome. In general use, polygenic is technical rather than conversational, but it provides a precise way to distinguish multi-gene inheritance from a monogenic pattern.
adjectiveIn genetics, polygenic means influenced by or involving multiple genes. The term is used to describe traits, conditions, and characteristics whose development or inheritance cannot be attributed to a single gene.
- In genetics, influenced by or involving multiple genes.
- In biology and medicine, describing a trait or condition whose development or inheritance depends on the combined effects of several genes, often together with environmental factors.
"Height is a highly polygenic trait influenced by many genes as well as environmental factors."
"Many common diseases are polygenic, with different combinations of genetic variants contributing to risk."
"The researchers identified a polygenic pattern associated with susceptibility to the condition."
Polygenic traits explain why some characteristics, such as height, vary continuously across a population instead of falling neatly into simple inherited categories.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does polygenic come from?
Polygenic was formed in the 19th century from the combining form poly-, meaning many, and the genetic element genic, relating to genes or origin. Its development followed the growth of genetics and the recognition that many biological traits are governed by multiple inherited factors. The word belongs to a family with monogenic, describing a single-gene pattern, and polygenesis, a term associated with the idea of multiple origins.
Related word forms
How polygenic is actually used
This is primarily a technical term in genetics, biology, and medicine. It is often used with traits, inheritance, diseases, and risk, and may be distinguished from monogenic conditions.
Easily confused with polygenic
Polygenic traits are influenced by multiple genes, whereas monogenic traits are primarily associated with one gene.