Clone CellsEmbryonic DevelopmentGene Expression Regulation, DevelopmentalEmbryonic and Fetal DevelopmentEmbryo, MammalianEmbryo, NonmammalianMolecular Sequence DataBase SequenceBlastocystCloning, MolecularAmino Acid SequenceIn Situ HybridizationZebrafishEmbryo LossRNA, MessengerChick EmbryoDNA, ComplementaryZebrafish ProteinsCell DifferentiationPregnancyOocytesTranscription FactorsZygoteMorphogenesisPhenotypeHomeodomain ProteinsMesodermBody PatterningSignal TransductionSequence Homology, Amino AcidMutationGenes, LethalGene TargetingMice, KnockoutDNANervous SystemOrganogenesisCell LineEmbryo Culture TechniquesGene ExpressionXenopus ProteinsEmbryonic Stem CellsDevelopmental BiologyCells, CulturedGastrulaMice, Inbred C57BLTranscription, GeneticDrosophila ProteinsDNA-Binding ProteinsDrosophilaFertilizationMice, TransgenicFertilization in VitroReverse Transcriptase Polymerase Chain ReactionDNA PrimersStem CellsOvumImmunohistochemistryTime FactorsOogenesisSequence Analysis, DNAXenopus laevisSequence AlignmentPolymerase Chain ReactionBlotting, NorthernYolk SacPhylogenyEctodermWnt ProteinsHedgehog ProteinsBlastulaMorulaTissue DistributionEmbryo ImplantationMice, Mutant StrainsGastrulationGene Expression ProfilingAnimals, Genetically ModifiedSomitesCell LineageEndodermGenes, HomeoboxCell MovementParthenogenesisGene Expression RegulationOrgan SpecificityNeural CrestModels, BiologicalNeural TubeLarvaSequence Homology, Nucleic AcidDrosophila melanogasterXenopusCentral Nervous SystemCell DivisionChromosome MappingEmbryologyHomozygoteGerm LayersTrans-Activators