Definition
noun, plural: facultative genes
(1) A gene transcribed only when needed or when a cell receives a signal from its surroundings.
(2) A gene whose expression is influenced by environmental factors.
Supplement
Unlike constitutive gene, a facultative gene is not transcribed continually but only when needed.
Compare: constitutive gene.
See also: gene expression.
Definition noun, plural: facultative genes (1) A gene transcribed only when needed or when a cell receives a signal from its surroundings. (2) A gene whose expression is influenced by environmental factors. Supplement Unlike constitutive gene, a facultative gene is not transcribed continually but only when needed. Compare: constitutive gene. See also: gene expression...
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