title: Chromosome markers and mental retardation.
mesh_terms: D005260:Female; D005819:Genetic Markers; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D012729:Sex Chromosome Aberrations / Q000175:diagnosis; D013019:South Africa; D014960:X Chromosome
chemical_list: D005819:Genetic Markers