title: Polymorphism of human C-band heterochromatin. I. Frequency of variants.
mesh_terms: D002875:Chromosomes; D005260:Female; D014644:Genetic Variation; D006570:Heterochromatin; D006801:Humans; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic; D012730:Sex Chromosomes; D013194:Staining and Labeling
chemical_list: D006570:Heterochromatin