Dosage Compensation, GeneticX Chromosome InactivationX ChromosomeRNA, Long NoncodingRNA, UntranslatedGenes, X-LinkedChromosomes, Human, XSex Chromosome AberrationsGenomic ImprintingIncontinentia PigmentiIn Situ Hybridization, FluorescenceTurner SyndromeMosaicismHybrid CellsGene SilencingRing ChromosomesHeterozygoteEquidaeAllelesTwins, MonozygoticChromosome MappingGenetic LinkageOrofaciodigital SyndromesPedigreeRett SyndromeVirus InactivationHistonesDNA MethylationSex ChromosomesMethylationKaryotypingMolecular Sequence DataMutationArylsulfatasesReceptors, AndrogenPolycomb-Group ProteinsSteryl-SulfataseIntellectual DisabilityLong Interspersed Nucleotide ElementsEmbryo, MammalianTranscription FactorsStem CellsKineticsPhenotypeTripletsPelizaeus-Merzbacher DiseaseCell LineTransgenesGene DeletionDAX-1 Orphan Nuclear ReceptorGenetic Diseases, X-LinkedMethyl-CpG-Binding Protein 2Chromosomes, MammalianY ChromosomeChromosomes, Artificial, YeastGenetic MarkersBlastocystRepressor ProteinsPolymerase Chain ReactionBase SequenceHeterozygote DetectionTranslocation, GeneticEpigenesis, GeneticPolycomb Repressive Complex 2Oxidoreductases, N-DemethylatingCpG IslandsTranscription, GeneticCells, CulturedDNA ProbesEmbryonic and Fetal DevelopmentLysineSodium ChannelsIon Channel GatingFibroblastsGene Expression Regulation, DevelopmentalChromatinSequence DeletionPlacentaGlucosephosphate DehydrogenaseDNAAcetylationPolycomb Repressive Complex 1Gene Expression RegulationMice, TransgenicModels, GeneticCell DifferentiationTrophoblastsMembrane PotentialsTrinucleotide RepeatsChromosome BandingBlotting, SouthernChromosomes, Artificial, BacterialHypoxanthine PhosphoribosyltransferaseEmbryonic Stem CellsMice, Inbred C57BLDNA-Binding ProteinsNuclear FamilyCrosses, GeneticAmino Acid SequenceGene Expression