Gene Expression Regulation, DevelopmentalEmbryonic StructuresEmbryo, NonmammalianBody PatterningEmbryo, MammalianZebrafishIn Situ HybridizationMesodermEmbryonic DevelopmentEmbryonic and Fetal DevelopmentOogenesisMolecular Sequence DataGastrulaPlant Somatic Embryogenesis TechniquesXenopus ProteinsAmino Acid SequenceZygoteDrosophila ProteinsOocytesXenopus laevisMorphogenesisBase SequenceBlastocystZebrafish ProteinsDrosophilaCaenorhabditis elegansTranscription FactorsDrosophila melanogasterRNA, MessengerHomeodomain ProteinsSeedsEndodermGerm CellsGenes, LethalXenopusCloning, MolecularOvumGenes, InsectGenes, HomeoboxDNA, ComplementarySequence Homology, Amino AcidCaenorhabditis elegans ProteinsVitellinsSea UrchinsCell DifferentiationNervous SystemEctodermGametogenesisMutationPhenotypeBlastulaInsect ProteinsDNA-Binding ProteinsFertilizationGastrulationBlastomeresAnimals, Genetically ModifiedNuclear ProteinsSignal TransductionEgg ProteinsEmbryonic InductionGene TargetingChick EmbryoGene ExpressionTranscription, GeneticSequence AlignmentOrganogenesisDNA PrimersNeural CrestInsect HormonesCell LineageMicroinjectionsCentral Nervous SystemChimeraMorulaLarvaCleavage Stage, OvumGerm LayersMice, KnockoutOryziasCell NucleusEmbryonic Stem CellsGene Expression Regulation, PlantReverse Transcriptase Polymerase Chain ReactionFetal ProteinsOvaryImmunohistochemistryStem CellsTime FactorsNotochordTrans-ActivatorsHeadGenomic ImprintingArabidopsisYolk SacRNAT-Box Domain ProteinsCell DivisionTATA Box Binding Protein-Like ProteinsRepressor Proteins