Nervous SystemEctodermNeural PlateXenopus ProteinsEmbryonic InductionBone Morphogenetic ProteinsGastrulaCell LineageBody PatterningGene Expression Regulation, DevelopmentalEmbryo, NonmammalianCell DifferentiationSense OrgansBasic Helix-Loop-Helix Transcription FactorsNeuronsOtx Transcription FactorsSOXB1 Transcription FactorsNodal ProteinReceptors, NotchBone Morphogenetic Protein 4Stem CellsDrosophila ProteinsXenopus laevisDrosophilaSignal TransductionXenopusCentral Nervous SystemNerve Tissue ProteinsIn Situ HybridizationHelix-Loop-Helix MotifsFibroblast Growth FactorsNeural Stem CellsEmbryonic Stem CellsHomeodomain ProteinsTranscription FactorsDNA-Binding ProteinsWnt ProteinsMolecular Sequence DataTransforming Growth Factor betaAmino Acid SequenceBase SequenceVulvaCaenorhabditis elegansCaenorhabditis elegans ProteinsMorphogenesisMesodermModels, BiologicalMutationZebrafish ProteinsReceptor, Notch1Animals, Genetically ModifiedEndodermBlastomeresMice, TransgenicJuvenile HormonesPhenotypeRepressor ProteinsCells, CulturedGenes, HelminthMembrane ProteinsChick EmbryoEmbryo, MammalianCell ProliferationHelminth ProteinsNeural CrestCell DivisionGenes, HomeoboxGenes, InsectDrosophila melanogasterEmbryonic DevelopmentTime FactorsEyeHedgehog ProteinsWnt1 ProteinGreen Fluorescent ProteinsTrans-ActivatorsMice, Inbred C57BLEmbryonic StructuresInsect ProteinsNuclear ProteinsNeurogliaNotochordApoptosisLarvaImmunohistochemistryCell LineGerm CellsCell PolarityCell Movementbeta CateninPhotoreceptor Cells, InvertebrateOrganogenesisPaired Box Transcription FactorsGerm LayersGene Expression RegulationMice, KnockoutTelencephalonRNA, MessengerT-Box Domain ProteinsSex Determination Processes