What does gene mean?
A gene is one of the basic units of heredity in living organisms. Each gene is a section of DNA that helps produce a particular protein or contributes to a biological function, while many human characteristics arise from the combined effects of multiple genes and environmental influences. The word is used most often in biology, medicine, genetics, and biotechnology, especially in phrases such as “gene therapy,” “gene editing,” and “dominant gene.” In popular writing, people may also speak of a “gene for” creativity, risk, or another trait, meaning an inherited or partly inherited predisposition rather than a simple, unchangeable cause. Although genes are often discussed as if they alone determine who a person is, their effects can interact with lifestyle, development, and the wider environment. Understanding the word is important for reading scientific research, interpreting claims about inherited conditions, and following contemporary debates about medicine and genetic technology.
nounA gene is a fundamental unit of heredity consisting of a sequence of DNA that contributes to a particular characteristic or biological function. In a broader sense, the word can refer to a genetic factor or predisposition.
- A fundamental unit of heredity consisting of a sequence of DNA that helps determine a characteristic or biological function.
- A broader reference to a genetic factor, inherited predisposition, or source of a particular trait.
"Researchers identified a gene that may help protect some people against a particular disease."
"Scientists have linked a rare gene to an increased risk of the condition."
"She has a genetic predisposition to the disease, but it does not determine the outcome."
The standard plural is “genes,” used when referring to multiple units of heredity or to genetic factors more generally.
"These genes influence both physical development and susceptibility to certain diseases."
A gene is a tiny stretch of DNA with a huge influence—and the word began as a Greek term meaning “kind” or “origin.”
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does gene come from?
The English word comes from Greek γένος (genos), meaning “race,” “kind,” or “origin,” a term historically used in discussions of heredity and biological classification. In the early twentieth century, the Danish biologist Wilhelm Johannsen introduced “gene” as the scientific name for a unit of inheritance. Related English forms such as genus, general, generic, and genius came through Latin from the same Indo-European root associated with kind, origin, or birth.
Related word forms
How gene is actually used
The word is chiefly associated with biology, genetics, medicine, and popular discussions of inherited traits. In nontechnical contexts, expressions such as “a gene for” may describe a characteristic or predisposition metaphorically.
Easily confused with gene
A gene is a unit of heredity, whereas a genie is a supernatural spirit, especially one that grants wishes.