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regulatory gene

or regulator gene

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noun Genetics.
  1. any gene that exercises control over the expression of another gene or genes.
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Origin of regulatory gene

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
regulator gene in Medicine

regulator gene

(rĕg′yə-lā′tər)
n.
  1. A gene that causes the production of a protein that represses the activity of another gene in an operon.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.