- a gene that under certain conditions causes the death of an organism.
Origin of lethal gene
First recorded in 1935–40
Also called lethal factor, lethal mutation.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A mutant trait that leads to a phenotype incapable of effective reproduction.
- A gene whose expression results in the death of the organism.