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lethal gene

noun, Genetics.
a gene that under certain conditions causes the death of an organism.
Also called lethal factor, lethal mutation.
Origin of lethal gene
First recorded in 1935-40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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lethal mutation in Medicine

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

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.
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