Y heterochromatin and XX males.
D046508:Culture Techniques; D003582:Cytogenetics; D006570:Heterochromatin; D006801:Humans; D007713:Klinefelter Syndrome / Q000235:genetics; D008297:Male; D008856:Microscopy, Fluorescence; D012730:Sex Chromosomes; D012732:Sex Determination Analysis; D012867:Skin / Q000166:cytology; D013737:Testis / Q000166:cytology; D014424:Turner Syndrome / Q000235:genetics
D006570:Heterochromatin