Skip to Content
Medical Term:


Pronunciation: op'er-on

Definition: A genetic functional unit that controls production of a messenger RNA; it consists of an operator gene and two or more structural genes located in sequence in the cis position on one chromosome.

[L. operor, to work, act, + -on]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.