title: Extrachromosomal element delta in Drosophila melanogaster. VI. Induction of recurrent lethal mutations in definite regions of second chromosomes.
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D002875:Chromosomes; D003433:Crosses, Genetic; D004331:Drosophila melanogaster; D005111:Extrachromosomal Inheritance; D005804:Genes, Lethal; D005854:Germ Cells; D009154:Mutation