lethal gene


noun Genetics.

a gene that under certain conditions causes the death of an organism.

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Also called lethal factor, lethal mutation.

Origin of lethal gene

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for lethal mutation (1 of 2)

lethal mutation

n.

A mutant trait that leads to a phenotype incapable of effective reproduction.

Medical definitions for lethal mutation (2 of 2)

lethal gene

n.

A gene whose expression results in the death of the organism.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.