Epigenesis, GeneticEpigenomicsDNA MethylationGene DosageCpG IslandsPromoter Regions, GeneticDosage Compensation, GeneticDosage FormsPhenotypeMutationGene DuplicationHeterozygoteX Chromosome InactivationAllelesDown SyndromeX ChromosomeTrisomyChromosomes, Human, Pair 21HaploinsufficiencyHomozygoteGene DeletionGenotypeAneuploidyGenes, FungalMice, TransgenicGenesSaccharomyces cerevisiaePlasmidsChromosome MappingPolyploidyGene AmplificationGenes, X-LinkedIn Situ Hybridization, FluorescenceMolecular Sequence DataMice, Inbred C57BLBase SequenceEye AbnormalitiesCharcot-Marie-Tooth DiseaseGenes, RegulatorMice, Mutant StrainsSex ChromosomesSuppression, GeneticTranscription, GeneticEscherichia coliCrosses, GeneticGenomic ImprintingGene Expression Regulation, DevelopmentalMice, KnockoutHereditary Sensory and Motor NeuropathyTranscription FactorsPolymerase Chain ReactionPAX2 Transcription FactorPloidiesGene Expression RegulationDiploidyGene ExpressionRNA, MessengerChromosomes, BacterialModels, GeneticGenes, BacterialSurvival of Motor Neuron 1 ProteinChromosome AberrationsHaploidyDNA-Binding Proteins