title: B-chromosome systems in flowering plants and animal species.
mesh_terms: D000220:Adaptation, Biological; D000828:Animal Population Groups; D000818:Animals; D001345:Autoradiography; D002455:Cell Division; D002875:Chromosomes / Q000648:ultrastructure; D004247:DNA; D005298:Fertility; D006570:Heterochromatin; D008540:Meiosis; D008854:Microscopy, Electron; D010641:Phenotype; D010944:Plants; D011995:Recombination, Genetic; D013045:Species Specificity
chemical_list: D006570:Heterochromatin; D004247:DNA