title: Subdivision of the human Y chromosome.
mesh_terms: D002455:Cell Division; D003720:Densitometry; D006570:Heterochromatin; D006801:Humans; D007621:Karyotyping; D008297:Male; D012730:Sex Chromosomes / Q000648:ultrastructure*; D013194:Staining and Labeling
chemical_list: D006570:Heterochromatin