title: Origins of genetic disease.
mesh_terms: D000130:Achondroplasia / Q000235:genetics; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D005718:Gametogenesis / Q000235:genetics; D030342:Genetic Diseases, Inborn / Q000209:etiology*; D006801:Humans; D008297:Male; D008423:Maternal Age; D009154:Mutation; D009456:Neurofibromatosis 1 / Q000235:genetics; D012737:Sex Factors