title: Nucleolus organizer regions of the canine karyotype.
abstract: Silver-stained preparations of cultured lymphocytes obtained from 12 pure-bred dogs revealed the presence of nucleolus organizer regions (NORs) on four to seven chromosomes in females and five to eight chromosomes in males. All seven males had a NOR on the Y chromosome. The telomeric location of the NORs on the autosomes suggested by an earlier study was confirmed.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D004285:Dogs; D005260:Female; D007621:Karyotyping; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*