PhenotypeGene DosageModels, GeneticMutationChromosome MappingGenotypeQuantitative Trait LociAllelesMolecular Sequence DataDosage Compensation, GeneticBase SequenceGenesAmino Acid SequenceCloning, MolecularGenome, HumanExonsRNA, MessengerTranscription, GeneticHeterozygoteGene Expression RegulationX ChromosomeGene DeletionGene ExpressionPlasmidsGene Expression ProfilingPolymerase Chain ReactionTranscription FactorsIntronsGene DuplicationSequence Analysis, DNAOligonucleotide Array Sequence AnalysisDNAMice, TransgenicHomozygoteHybrid CellsChromosomes, Human, Pair 21Promoter Regions, GeneticMice, Inbred C57BLDNA, ComplementaryDosage FormsGenetic LinkageSaccharomyces cerevisiaeX Chromosome InactivationIn Situ Hybridization, FluorescenceSequence Homology, Amino AcidCell LineDNA-Binding ProteinsGenes, FungalGenetic Complementation TestRestriction MappingDown SyndromeMultigene FamilyEscherichia coliReverse Transcriptase Polymerase Chain ReactionGene Expression Regulation, DevelopmentalBlotting, SouthernCrosses, GeneticDNA Mutational AnalysisMice, KnockoutGenes, BacterialPedigreePolymorphism, GeneticDNA PrimersHaploinsufficiencyTrisomyGenetic VariationNucleic Acid HybridizationProteinsSequence Homology, Nucleic AcidEvolution, MolecularPolymorphism, Single NucleotideMice, Mutant StrainsSequence AlignmentGenes, X-LinkedNuclear ProteinsGenetic Predisposition to DiseaseDisease Models, AnimalGenes, RegulatorGenetic VectorsDatabases, GeneticSequence DeletionSuppression, GeneticAlternative SplicingAneuploidySex ChromosomesCells, CulturedGenetic MarkersGene AmplificationDrosophila ProteinsChromosome DeletionDrosophila melanogasterGenomic ImprintingMembrane ProteinsChromosomes, Human, Pair 17Signal TransductionDNA Transposable ElementsChromosomesGenes, DominantSaccharomyces cerevisiae ProteinsEye Abnormalities