Gene DosageDosage Compensation, GeneticMolecular Sequence DataBase SequenceGenesGenome, HumanChromosome MappingExonsMutationCloning, MolecularPhenotypeAmino Acid SequenceDosage FormsAllelesTranscription, GeneticGene DuplicationRNA, MessengerIntronsHeterozygoteGene Expression RegulationX ChromosomeDNAX Chromosome InactivationGene ExpressionChromosomes, Human, Pair 21Gene Expression ProfilingHybrid CellsDown SyndromeDNA, ComplementaryOligonucleotide Array Sequence AnalysisPromoter Regions, GeneticPlasmidsPolymerase Chain ReactionTranscription FactorsIn Situ Hybridization, FluorescenceSaccharomyces cerevisiaeMice, TransgenicGene DeletionGenotypeTrisomyModels, GeneticHomozygoteGenes, FungalSequence Analysis, DNAHaploinsufficiencySequence Homology, Amino AcidRestriction MappingMultigene FamilyAneuploidyDNA-Binding ProteinsCell LineSequence Homology, Nucleic AcidMice, Inbred C57BLNucleic Acid HybridizationEvolution, MolecularDatabases, GeneticGene AmplificationBlotting, SouthernProteinsAlternative SplicingGenes, RegulatorGene Expression Regulation, DevelopmentalGenetic VectorsReverse Transcriptase Polymerase Chain ReactionEscherichia coliPolyploidyGenetic Diseases, InbornGenes, X-LinkedMice, Mutant StrainsComputational BiologyGene LibraryGenomic ImprintingGenetic Complementation TestExpressed Sequence TagsSequence AlignmentDNA PrimersDNA Mutational AnalysisMice, KnockoutEye AbnormalitiesCharcot-Marie-Tooth DiseaseNuclear ProteinsSex ChromosomesSuppression, GeneticSaccharomyces cerevisiae ProteinsGenetic VariationChromosomesSequence DeletionCrosses, GeneticChromosome AberrationsDrosophila melanogasterDrosophila ProteinsHereditary Sensory and Motor NeuropathyDisease Models, AnimalChromosomes, Human, Pair 17Genetic LinkageFungal ProteinsConserved SequenceDrosophilaPAX2 Transcription FactorRNA