fluctuation test

fluctuation test

[‚flək·chə′wā·shən ‚test]
(microbiology)
A method of demonstrating that bacterial mutations preexist in a population before they are selected; a large parent population is divided into small parts which are grown independently and the number of mutants in each subculture determined; the number of mutants in the subculture will fluctuate because in some a mutant arises early (giving a large number of progeny), while in others the mutant arises late and gives few progeny.
References in periodicals archive ?
1975) or fluctuation test (Luria and Delbruck 1943; Hubbard et al.
In this study, leachates made with crumb rubber infill collected directly from the surfaces of four separate artificial athletic fields (fields A through D) were assayed for mutagenic potential with fluctuation tests.
Salmonella / microsome fluctuation test (Ames fluctuation test).