title: Cytological variations in the constitutive heterochromatin of Microtus agrestis.
mesh_terms: D000367:Age Factors; D000818:Animals; D002843:Chromatin; D002875:Chromosomes; D005260:Female; D006570:Heterochromatin; D008297:Male; D008938:Mitosis; D012377:Rodentia
chemical_list: D002843:Chromatin; D006570:Heterochromatin