GastrulaStarfishEmbryo, NonmammalianXenopus laevisMesodermXenopus ProteinsBlastomeresEctodermEmbryonic InductionXenopusCleavage Stage, OvumOocytesBody PatterningNodal ProteinActivinsZebrafishSea UrchinsGene Expression Regulation, DevelopmentalEndodermZebrafish ProteinsCell PolarityBlastocystMicroinjectionsZygoteOvumIn Situ HybridizationFertilizationMorphogenesisSpindle ApparatusInhibinsMolecular Sequence DataRNA, MessengerAmino Acid SequenceHomeodomain ProteinsSignal TransductionCell DifferentiationTranscription FactorsMicrotubulesSpindle PolesCloning, MolecularMitosisBase SequenceCentrosomeAnaphaseKinetochoresMetaphaseChromosome SegregationMicrotubule-Associated ProteinsTubulinKinesinMeiosisSpindle Pole BodiesDyneinsMicroscopy, FluorescenceCell Cycle ProteinsCaulobacter crescentusChromosomesSchizosaccharomycesCentriolesMicrotubule-Organizing CenterDrosophila ProteinsSaccharomyces cerevisiae ProteinsTelophaseGreen Fluorescent ProteinsNocodazoleOogenesisMoonSaccharomyces cerevisiaeMicroscopy, ElectronSchizosaccharomyces pombe ProteinsMutationModels, BiologicalDrosophilaNuclear ProteinsCentromereCytoskeletal ProteinsCell CycleCell DivisionFungal ProteinsRecombinant Fusion ProteinsCytoplasmBacterial ProteinsMicrotubule ProteinsProphaseLuminescent ProteinsNuclear EnvelopeMicroscopy, VideoPotoroidaeAurora KinasesDrosophila melanogasterCytokinesisFluorescent Antibody TechniqueChromatidsBlastodermOrganoidsMolecular Motor ProteinsProtein TransportChromosomes, FungalCell NucleusSalamandridae