title: Ribosomal RNA genes with an intervening sequence are clustered within the X chromosomal ribosomal DNA of Drosophila hydei.
mesh_terms: D000818:Animals; D001482:Base Composition; D001483:Base Sequence; D002874:Chromosome Mapping; D004247:DNA; D004330:Drosophila; D004587:Electrophoresis, Agar Gel; D005260:Female; D008854:Microscopy, Electron; D009697:Nucleolus Organizer Region; D012335:RNA, Ribosomal; D012730:Sex Chromosomes; D014960:X Chromosome
chemical_list: D012335:RNA, Ribosomal; D004247:DNA