Embryo, MammalianEmbryo, NonmammalianMammalsEmbryonic DevelopmentChick EmbryoBlastocystGene Expression Regulation, DevelopmentalMolecular Sequence DataStem CellsEmbryo ImplantationNerve RegenerationZygoteOocytesAmino Acid SequenceEmbryonic and Fetal DevelopmentNeuronsCell LineBlastomeresBase SequenceLateral VentriclesCleavage Stage, OvumCell DifferentiationEpendymaIn Situ HybridizationAdult Stem CellsNeurogenesisRNA, MessengerCells, CulturedEmbryo LossTranscription FactorsSignal TransductionBromodeoxyuridineFertilization in VitroCerebral VentriclesPregnancyBody PatterningCricetinaeNerve Tissue ProteinsCell LineageGastrulaCloning, MolecularMice, Inbred C57BLXenopus ProteinsMutationSequence Homology, Amino AcidProsencephalonGene Expression RegulationMorulaTime FactorsAxonsRegenerationDrosophila ProteinsImmunohistochemistryGreen Fluorescent ProteinsHeLa CellsModels, BiologicalXenopus laevisDrosophilaNeural Stem CellsBrainCell NucleusDNA-Binding ProteinsOlfactory BulbTransfectionMicroscopy, ConfocalXenopusCell DivisionDentate GyrusDNAZebrafishNeurogliaCaenorhabditis elegansCell ProliferationFertilizationDrosophila melanogasterOogenesisCell CountMorphogenesisMesodermCentral Nervous SystemMice, TransgenicPhenotypeCaenorhabditis elegans ProteinsTranscription, GeneticOvumRNA, Messenger, StoredGene ExpressionMembrane ProteinsRecombinant Fusion ProteinsCHO CellsMitosisProtein BindingMicroscopy, ElectronMyelin ProteinsNuclear ProteinsCell SurvivalGerm CellsHomeodomain ProteinsEctodermCulture Techniques