title: Human chromosome identification by differential staining: G goup (21-22-Y).
mesh_terms: D002904:Chromosomes, Human, 21-22 and Y; D004247:DNA; D004314:Down Syndrome; D006570:Heterochromatin; D006801:Humans; D007621:Karyotyping; D008297:Male; D008722:Methods; D009695:Nucleic Acid Renaturation; D013194:Staining and Labeling
chemical_list: D006570:Heterochromatin; D004247:DNA