Trinucleotide RepeatsTrinucleotide Repeat ExpansionPolymorphism, GeneticPolymorphism, Single NucleotideAllelesGene FrequencyGenetic Predisposition to DiseaseFriedreich AtaxiaBase SequenceFragile X SyndromeHuntington DiseasePolymerase Chain ReactionHaplotypesSpinocerebellar DegenerationsMolecular Sequence DataGenotypeCase-Control StudiesFragile X Mental Retardation ProteinMicrosatellite RepeatsRepetitive Sequences, Nucleic AcidGenetic VariationDNASequence Analysis, DNANucleic Acid ConformationMachado-Joseph DiseasePolymorphism, Single-Stranded ConformationalMutationGenetic Association StudiesGenetic MarkersLinkage DisequilibriumAsian Continental Ancestry GroupPhenotypeMinisatellite RepeatsDNA PrimersPedigreeHeterozygoteNerve Tissue ProteinsHeredodegenerative Disorders, Nervous SystemModels, GeneticGenomic InstabilityExonsChromosome MappingAge of OnsetPromoter Regions, GeneticOligonucleotidesDinucleotide RepeatsDNA Mutational AnalysisCodonTandem Repeat SequencesHomozygoteRisk FactorsGenetic LinkageFlap EndonucleasesGenetic Diseases, InbornIron-Binding ProteinsMuscular Dystrophy, OculopharyngealChromosome FragilityGenetics, PopulationGenome, HumanRNA-Binding ProteinsMethylenetetrahydrofolate Reductase (NADPH2)DNA RepairEuropean Continental Ancestry GroupAmplified Fragment Length Polymorphism AnalysisAnticipation, GeneticReceptors, AndrogenChinaCerebellar AtaxiaPoint MutationOligodeoxyribonucleotidesIntronsGenetic LociAmino Acid SequenceInverted Repeat SequencesNucleic Acid HeteroduplexesNucleotidesNuclear ProteinsPhylogenyGenetic TestingGuaninePeptidesTranscription, GeneticIntranuclear Inclusion BodiesChromosome Fragile SitesRNA, MessengerOdds RatioDNA-Binding ProteinsEvolution, MolecularDNA, PlantNeurodegenerative DiseasesGenome-Wide Association StudySequence DeletionExpressed Sequence TagsSequence Tagged SitesSpecies SpecificityPeptidyl-Dipeptidase AChromosomes, Human, XGlutathione TransferaseCatechol O-MethyltransferaseGene Knock-In Techniques