title: Fragile X-linked mental retardation.
mesh_terms: D005006:Ethnicity; D005260:Female; D005787:Gene Frequency; D008040:Genetic Linkage; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D010641:Phenotype; D012730:Sex Chromosomes / Q000648:ultrastructure*; D013030:Spain / Q000208:ethnology; D009626:Terminology as Topic; D014481:United States; D014960:X Chromosome / Q000648:ultrastructure*