VertebratesEmbryo, NonmammalianEmbryo, MammalianChick EmbryoZebrafishGene Expression Regulation, DevelopmentalBody PatterningZebrafish ProteinsEmbryonic DevelopmentEmbryo ImplantationGastrulaXenopus ProteinsMesodermBlastocystIn Situ HybridizationMolecular Sequence DataEmbryonic and Fetal DevelopmentSomitesEmbryonic InductionMorphogenesisNeural CrestNodal ProteinXenopusHomeodomain ProteinsAmino Acid SequenceEctodermXenopus laevisBase SequenceNotochordTranscription FactorsEmbryo LossOrganizers, EmbryonicSignal TransductionNervous SystemBone Morphogenetic ProteinsMammalsQuailGoosecoid ProteinFertilization in VitroAnimals, Genetically ModifiedBlastomeresCleavage Stage, OvumWnt ProteinsEndodermSequence Homology, Amino AcidPregnancyMorpholinosGenes, HomeoboxEmbryologyCiona intestinalisAvian ProteinsRNA, MessengerDrosophila ProteinsMutationRhombencephalonModels, BiologicalExtremitiesDrosophilaDNA-Binding ProteinsCloning, MolecularZygoteFibroblast Growth FactorsOocytesT-Box Domain ProteinsNeural PlateEmbryo DispositionGastrulationMorulaDevelopmental BiologyCell DifferentiationFetal ProteinsPhenotypeDNA, ComplementaryTrans-ActivatorsSequence AlignmentFibroblast Growth Factor 8CoturnixTailHedgehog ProteinsCryopreservationCell LineageTretinoinTime FactorsMicroinjectionsProteinsGene ExpressionHeadCell MovementBiological EvolutionEvolution, MolecularCulture TechniquesBone Morphogenetic Protein 4Branchial RegionTranscription, GeneticLeft-Right Determination FactorsOligoribonucleotides, AntisenseCloning, OrganismRepressor ProteinsReceptors, NotchEmbryo Research