FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
The frequency of recessive lethal mutations induced by diethyl sulfate is increased in mutant flies compared to wild type.
Homozygous adults show an increased frequency of induction of recessive lethal mutations on the X chromosome compared with wild-type adults after treatment with methyl bromide.
A number of v mutants have been induced by ethyl methanesulfonate, and the effect of mus201unspecified on the frequency of transitions and transversions has been studied. The number of GC to AT transitions is much lower in mus201unspecified flies compared to wild-type, and there is an increase in the number of transversions.