Ascertainment and age of onset in pedigree analysis.
D000367:Age Factors; D000483:Alleles; D004777:Environment; D030342:Genetic Diseases, Inborn; D005826:Genetics, Medical; D005838:Genotype; D006801:Humans; D008954:Models, Biological; D010375:Pedigree; D010641:Phenotype