semilethal


Also found in: Dictionary.

semilethal

adjective Referring to a mutant gene which is lethal if present on both of a pair of genes—i.e., in the homozygous state—as occurs in autosomal recessive traits.
References in periodicals archive ?
Lethal t haplotypes may occur more frequently than semilethal t haplotypes (Klein et al.
Although semilethal t/t mice are viable and may have been present in previous samples, the males are always sterile and could not have produced progeny for testing.
However, the results provide no information on mutations becoming lethal or semilethal in harsh media.
195) argued that downward selection for longevity would probably result "in the collection of a series of more or less deleterious, semilethal or conditional lethal genes," which do not, however, have any bearing on the genes involved in aging.