title: Variability and familial transmission of constitutive heterochromatin of human chromosomes evaluated by the method of linear measurement.
mesh_terms: D002875:Chromosomes / Q000648:ultrastructure; D002900:Chromosomes, Human, 1-3; D002902:Chromosomes, Human, 16-18; D002906:Chromosomes, Human, 6-12 and X; D003584:Cytological Techniques; D005260:Female; D006570:Heterochromatin; D006801:Humans; D008297:Male; D010334:Paternity; D012730:Sex Chromosomes; D014998:Y Chromosome
chemical_list: D006570:Heterochromatin