B chromosomes.
D000818:Animals; D002869:Chromosome Aberrations; D002874:Chromosome Mapping; D002875:Chromosomes / Q000032:analysis; D003434:Crossing Over, Genetic; D004247:DNA / Q000032:analysis; D005260:Female; D005838:Genotype; D006110:Grasshoppers / Q000648:ultrastructure; D006570:Heterochromatin; D006801:Humans; D008297:Male; D008540:Meiosis; D008938:Mitosis; D010641:Phenotype; D010944:Plants / Q000648:ultrastructure; D011995:Recombination, Genetic; D012641:Selection, Genetic; D012730:Sex Chromosomes; D013045:Species Specificity; D014158:Transcription, Genetic
D006570:Heterochromatin; D004247:DNA