Gene DosageDosage Compensation, GeneticPhenotypeMutationDosage FormsHeterozygoteGene DuplicationAllelesX Chromosome InactivationDown SyndromeX ChromosomeTrisomyMolecular Sequence DataGene DeletionChromosomes, Human, Pair 21Mice, TransgenicHomozygoteHaploinsufficiencyGenotypeAneuploidyGenes, FungalSaccharomyces cerevisiaeMice, Inbred C57BLGenesPlasmidsBase SequenceChromosome MappingIn Situ Hybridization, FluorescenceGene Expression Regulation, DevelopmentalPolyploidyMice, KnockoutGene AmplificationMice, Mutant StrainsMorphogenesisGenes, X-LinkedCrosses, GeneticMicroscopy, Electron, ScanningTranscription FactorsEscherichia coliEye AbnormalitiesTranscription, GeneticGene ExpressionRNA, MessengerGene Expression RegulationSuppression, GeneticCharcot-Marie-Tooth DiseaseGenes, RegulatorPolymerase Chain ReactionSex ChromosomesGenomic ImprintingPloidiesDiploidyDisease Models, AnimalHereditary Sensory and Motor NeuropathyDNA-Binding ProteinsCloning, MolecularPAX2 Transcription FactorChromosome AberrationsModels, GeneticTime FactorsAmino Acid SequenceDrosophila ProteinsGene Expression Regulation, FungalGenes, BacterialFungal ProteinsChromosomesSaccharomyces cerevisiae ProteinsHaploidyHomeodomain ProteinsChromosomes, BacterialCells, CulturedDrosophila melanogasterDrosophilaGenes, LethalMicroscopy, ElectronOligonucleotide Array Sequence AnalysisSurvival of Motor Neuron 1 ProteinDNA Mutational AnalysisReverse Transcriptase Polymerase Chain ReactionMyelin ProteinsGenetic Complementation TestCell DivisionImmunohistochemistrySequence DeletionSMN Complex ProteinsDose-Response Relationship, DrugSurvival of Motor Neuron 2 ProteinDNAGene Expression ProfilingModels, BiologicalRepressor ProteinsHeteroduplex AnalysisCell LineRNA, Long NoncodingDiGeorge SyndromeRNA, RibosomalMonosomyNucleic Acid HybridizationCell DifferentiationNucleic Acid Amplification Techniques