Evidence of the absence of Y fluorescent material in XX men.
D002467:Cell Nucleus; D002904:Chromosomes, Human, 21-22 and Y; D002906:Chromosomes, Human, 6-12 and X; D005453:Fluorescence; D006651:Histocytochemistry; D006801:Humans; D007713:Klinefelter Syndrome / Q000473:pathology*; D008297:Male; D008938:Mitosis; D012728:Sex Chromatin / Q000032:analysis; D012729:Sex Chromosome Aberrations / Q000473:pathology*