title: Biology of penetrance and variable expressivity.
mesh_terms: D000483:Alleles; D000818:Animals; D000013:Congenital Abnormalities / Q000235:genetics; D004247:DNA / Q000235:genetics; D005260:Female; D005796:Genes; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D008297:Male; D009154:Mutation; D010641:Phenotype; D012641:Selection, Genetic; D012730:Sex Chromosomes; D013577:Syndrome
chemical_list: D004247:DNA