Temperature-sensitive mutations in Drosophila melanogaster,I. Relative frequencies among gamma-ray and chemically induced sex-linked recessive lethals and semilethals.

Abstract
Sex-linked recessive mutations that are lethals and semilethals at 29[degree]C but survive at 17[degree]C were recovered in D. melanogaster. Of the lethals and semilethals induced by gamma-rays and mitomycin C, 3.2 and 3.5%, respectively, are temperature-sensitive (ts), whereas it is estimated that at least 10.7% of the lethals and semilethals induced by ethyl methanesulfonate are stable ts mutants. Such mutants provide a useful tool for a variety of genetic analyses.