PenetranceGenes, DominantPedigreePhenotypeHeterozygoteMutationGenetic LinkageGenetic Predisposition to DiseaseOptic Atrophy, Hereditary, LeberLod ScoreAllelesGerm-Line MutationFamily HealthGenotypeDNA Mutational AnalysisGenetic TestingGenes, BRCA1Genes, ModifierModels, GeneticAge of OnsetFounder EffectHirschsprung DiseaseChromosome MappingHaplotypesHomozygoteGenes, RecessiveJewsGenetic HeterogeneityGene FrequencyGenetic Diseases, InbornGenes, BRCA2Dystonia Musculorum DeformansMutation, MissenseFamilySyndromeGenetic MarkersHeterozygote DetectionCrosses, GeneticDystoniaBRCA2 Protein