Cloning, MolecularEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEmbryo ImplantationClone CellsBlastocystMolecular Sequence DataEmbryonic DevelopmentBase SequenceAmino Acid SequenceGene Expression Regulation, DevelopmentalEmbryo LossEmbryonic and Fetal DevelopmentFertilization in VitroCloning, OrganismCleavage Stage, OvumBlastomeresDNA, ComplementaryPregnancySequence Homology, Amino AcidEmbryo DispositionMorulaZygoteZebrafishRNA, MessengerIn Situ HybridizationOocytesGastrulaCryopreservationBody PatterningDNAMorphogenesisNuclear Transfer TechniquesEmbryo ResearchCulture TechniquesMesodermSingle Embryo TransferSequence AlignmentGene ExpressionEctogenesisEctodermZebrafish ProteinsMutationTranscription FactorsSequence Homology, Nucleic AcidPregnancy RateSequence Analysis, DNASeedsXenopus ProteinsPolymerase Chain ReactionHomeodomain ProteinsPhenotypeDNA PrimersDrosophilaBlotting, NorthernSperm Injections, IntracytoplasmicTranscription, GeneticDrosophila ProteinsParthenogenesisChromosome MappingCell LineEndodermCell DifferentiationNucleic Acid HybridizationFetal ViabilitySea UrchinsGenesXenopus laevisEmbryonic InductionXenopusPlasmidsBlastodermEscherichia coliCattleTime FactorsAnimals, Genetically ModifiedBlotting, SouthernRecombinant ProteinsFertilizationGenes, BacterialMicroinjectionsChimeraPreimplantation DiagnosisNervous SystemDNA-Binding ProteinsRestriction MappingPhylogenyGene LibraryNotochordYolk SacCulture MediaSuperovulationTissue DistributionReverse Transcriptase Polymerase Chain ReactionDrosophila melanogasterSomitesMice, Inbred StrainsOvumCell Division