Embryo, MammalianClone CellsEmbryo, NonmammalianChick EmbryoMolecular Sequence DataCloning, MolecularBase SequenceEmbryo ImplantationAmino Acid SequenceBlastocystEmbryonic DevelopmentGene Expression Regulation, DevelopmentalSequence Homology, Amino AcidEmbryonic and Fetal DevelopmentEmbryo LossSequence Analysis, DNADNA, ComplementaryRNA, MessengerCloning, OrganismPhylogenyPregnancyFertilization in VitroMutationBlastomeresCleavage Stage, OvumEscherichia coliDNAPolymerase Chain ReactionSequence AlignmentZebrafishPhenotypeDNA, BacterialGenes, BacterialSequence Homology, Nucleic AcidPlasmidsIn Situ HybridizationNucleic Acid HybridizationCell LineSpecies SpecificityTime FactorsOocytesGene ExpressionTranscription, GeneticZygoteMorulaEmbryo DispositionDNA PrimersGenesBacterial ProteinsNuclear Transfer TechniquesTranscription FactorsChromosome MappingBody PatterningGastrulaCulture MediaRecombinant ProteinsMorphogenesisCryopreservationBacteriaCulture TechniquesBlotting, SouthernModels, BiologicalCattleAnti-Bacterial AgentsDrosophilaMesodermDrosophila ProteinsGene Expression RegulationDNA Restriction EnzymesZebrafish ProteinsCell DifferentiationBlotting, NorthernEmbryo ResearchSignal TransductionSingle Embryo TransferDNA-Binding ProteinsEctogenesisMice, Inbred C57BLAnimals, Genetically ModifiedEctodermDNA, RecombinantMultigene FamilyRestriction MappingHomeodomain ProteinsDrosophila melanogasterReverse Transcriptase Polymerase Chain ReactionEvolution, MolecularSeedsXenopus laevisOpen Reading FramesXenopus ProteinsGenetic Complementation TestCell DivisionCaenorhabditis elegansPromoter Regions, GeneticXenopusPregnancy RateGenetic VariationParthenogenesisMice, Inbred Strains