title: X and Y chromosomal ribosomal DNA of Drosophila: comparison of spacers and insertions.
mesh_terms: D005075:Biological Evolution; D004247:DNA / Q000032:analysis / Q000235:genetics*; D004331:Drosophila melanogaster; D005260:Female; D005796:Genes; D008297:Male; D009693:Nucleic Acid Hybridization; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D012730:Sex Chromosomes; D014960:X Chromosome; D014998:Y Chromosome
chemical_list: D012335:RNA, Ribosomal; D004247:DNA