Traditional views and new perspectives on the genetics of mild mental retardation.
Normal intelligence and mild mental retardation are generally assumed to be determined by additive polygenes. This old and basic theory is challenged by findings from modern population studies. The discrepancies concern frequency of mild mental retardation, sex ratio, and additional somatic handicaps in populations with mild mental retardation.
Akesson
H O
HO
Department of Psychiatry III, Lillhagen Hospital, University of Göteborg, Sweden.
D006801:Humans; D008607:Intellectual Disability / Q000150:complications / Q000453:epidemiology / Q000235:genetics*; D005810:Multigene Family; D009468:Neuromuscular Diseases / Q000150:complications; D012737:Sex Factors