title: ANALYSIS OF CHROMOSOME 4 IN DROSOPHILA MELANOGASTER. I. SPONTANEOUS AND X-RAY-INDUCED LETHALS.
mesh_terms: D000818:Animals; D002875:Chromosomes; D002894:Chromosomes, Human, Pair 4; D004330:Drosophila; D004331:Drosophila melanogaster; D006801:Humans; D009154:Mutation; D011831:Radiation Genetics; D012106:Research; D014965:X-Rays
keywords: CHROMOSOMES; DROSOPHILA; EXPERIMENTAL LAB STUDY; MUTATION; RADIATION GENETICS