title: Unintegrated ribosomal genes and their relation to position effect variegation in Drosophila melanogaster.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000502:physiology; D007446:Chromosome Inversion; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D005796:Genes; D008040:Genetic Linkage; D008297:Male; D012335:RNA, Ribosomal / Q000096:biosynthesis / Q000235:genetics*; D014960:X Chromosome / Q000502:physiology
chemical_list: D012335:RNA, Ribosomal