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lethal gene

noun, Genetics.
1.
a gene that under certain conditions causes the death of an organism.
Also called lethal factor, lethal mutation.
Origin
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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lethal factor in Medicine

lethal factor n.
A gene mutation or chromosomal structural change that when expressed causes death before sexual maturity.

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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