title: Identification by fluorescence of two G rings: (46,XY,21r) G deletion syndrome I and (46, XX, 22r) G deletion syndrome II.
mesh_terms: D000015:Abnormalities, Multiple; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002904:Chromosomes, Human, 21-22 and Y; D006801:Humans; D008297:Male; D008856:Microscopy, Fluorescence; D011796:Quinacrine
chemical_list: D011796:Quinacrine