title: Is it always the same NOR that is more active in a pair of acrocentrics with distinct AG-stainings?
mesh_terms: D002871:Chromosome Banding; D002901:Chromosomes, Human, 13-15 / Q000648:ultrastructure*; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure*; D006801:Humans; D007621:Karyotyping; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D012834:Silver; D013194:Staining and Labeling
chemical_list: D012834:Silver