VertebratesAnimal Care CommitteesAnimal WelfareClone CellsZebrafishMolecular Sequence DataEmbryo, NonmammalianGene Expression Regulation, DevelopmentalAmino Acid SequenceBase SequenceEmbryo, MammalianCloning, MolecularXenopus ProteinsEmbryonic DevelopmentGastrulaZebrafish ProteinsChick EmbryoBlastocystXenopusSequence Homology, Amino AcidCell DifferentiationBody PatterningXenopus laevisIn Situ HybridizationDNA, ComplementaryEvolution, MolecularRNA, MessengerCell LineTranscription FactorsCaenorhabditis elegansDNAMorphogenesisCell AggregationBlastomeresUrochordataSequence AlignmentSpecies SpecificityChordata, NonvertebrateVitellinsEmbryonic Stem CellsHomeodomain ProteinsBiological EvolutionCell LineageMesodermMutationAnimals, Genetically ModifiedCells, CulturedDrosophila ProteinsFishesDrosophilaMitosisSignal TransductionLampreysOvumEndodermEctodermOocytesConserved SequenceChickensCaenorhabditis elegans ProteinsCell DivisionTranscription, GeneticNeural CrestDNA-Binding ProteinsHagfishesTeratomaMammalsPhenotypeQuailReptilesCarcinoma, EmbryonalDNA PrimersInvertebratesSequence Analysis, DNASalamandridaeCell CycleModels, BiologicalGastrulationTeratocarcinomaEmbryonic and Fetal DevelopmentSequence Homology, Nucleic AcidGene Expression RegulationLarvaGene ExpressionDrosophila melanogasterCleavage Stage, OvumEmbryonic InductionNervous SystemBlastulaNuclear ProteinsSea UrchinsPolymerase Chain ReactionNotochordStem CellsEmbryonal Carcinoma Stem CellsDipteraNucleic Acid HybridizationCDC2 Protein KinaseNuclear Transfer TechniquesStarfish