title: Variation in the nonfluorescent segment of long Y chromosome.
mesh_terms: D002478:Cells, Cultured; D005453:Fluorescence; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D008214:Lymphocytes; D008297:Male; D008856:Microscopy, Fluorescence; D009864:Ontario; D011110:Polymorphism, Genetic; D012730:Sex Chromosomes