reporter gene

A reporter gene is a gene that scientists insert into an organism to help monitor the activity of other genes. It produces a measurable product, such as a fluorescent protein or an enzyme that causes a color change, indicating when and where specific genes are active. This tool allows researchers to study gene function, regulation, and expression patterns in living cells or organisms without interfering with normal biological processes. Essentially, a reporter gene acts as a visible or detectable marker, making it easier to track genetic activity and understand how genes work.