title: Marker X chromosomes, mental retardation and macro-orchidism.
mesh_terms: D002869:Chromosome Aberrations; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D012730:Sex Chromosomes; D013737:Testis / Q000002:abnormalities*; D014960:X Chromosome