title: Studies on ribosomal DNA in cetaceans (whales).
mesh_terms: D000818:Animals; D002591:Cetacea / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics*; D011110:Polymorphism, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D013045:Species Specificity; D014907:Whales / Q000235:genetics*
chemical_list: D004275:DNA, Ribosomal