title: An XXXY sex chromosome complex in Klinefelter subjects with duplicated sex chromatin.
mesh_terms: D002875:Chromosomes; D006801:Humans; D007713:Klinefelter Syndrome / Q000235:genetics*; D012728:Sex Chromatin; D012730:Sex Chromosomes; D019849:Sex Determination Processes
keywords: CHROMOSOMES; KLINEFELTER'S SYNDROME/genetics; SEX DETERMINATION