Cell LineageGene Expression Regulation, DevelopmentalBody PatterningVulvaCell DifferentiationReceptors, NotchHomeodomain ProteinsEmbryo, NonmammalianDrosophila ProteinsCaenorhabditis elegans ProteinsCaenorhabditis elegansTranscription FactorsBasic Helix-Loop-Helix Transcription FactorsStem CellsDrosophilaZebrafish ProteinsSignal TransductionMorphogenesisMesodermEmbryonic InductionIn Situ HybridizationZebrafishAnimals, Genetically ModifiedEndodermWnt ProteinsEctodermGenes, HelminthSense OrgansNerve Tissue ProteinsMutationGastrulaJuvenile HormonesXenopus ProteinsNeurogenesisGenes, HomeoboxModels, BiologicalNeural PlatePhotoreceptor Cells, InvertebrateNeuronsGenes, InsectDisorders of Sex DevelopmentHedgehog ProteinsBlastomeresDNA-Binding ProteinsBone Morphogenetic ProteinsRepressor ProteinsWnt1 ProteinDrosophila melanogasterPhenotypeGastrulationHelminth ProteinsEyeEmbryonic DevelopmentNervous SystemMolecular Sequence DataCompound Eye, ArthropodOrganogenesisEmbryonic Stem CellsTelencephalonReceptor, Notch1Central Nervous SystemT-Box Domain ProteinsInsect ProteinsOrganizers, EmbryonicChick EmbryoPaired Box Transcription FactorsMembrane ProteinsUrochordataNeural Stem CellsNeural CrestEmbryo, MammalianTrans-ActivatorsEye ProteinsLarvaBone Morphogenetic Protein 4Mice, TransgenicEpistasis, GeneticWingbeta CateninFibroblast Growth FactorsAmino Acid SequenceBase SequenceGreen Fluorescent ProteinsNeurogliaHelix-Loop-Helix MotifsNuclear ProteinsCell PolarityXenopusEar, InnerActivinsGonadsCell DivisionHigh Mobility Group ProteinsImmunohistochemistryElectroporationRetinaCell ProliferationSequence Homology, Amino AcidLIM-Homeodomain ProteinsRNA Interference