Chick EmbryoBlastodermGastrulaEmbryonic InductionMesodermNotochordEctodermNervous SystemMorphogenesisIn Situ HybridizationGene Expression Regulation, DevelopmentalEmbryo, NonmammalianAvian ProteinsEmbryo, MammalianCell MovementQuailChickensCulture TechniquesLimb BudsBody PatterningExtremitiesEndodermEmbryo ImplantationEmbryonic DevelopmentBlastocystHeartHomeodomain ProteinsTime FactorsCell DifferentiationAllantoisMicroscopy, ElectronEmbryonic and Fetal DevelopmentMolecular Sequence DataChorionChorioallantoic MembraneEmbryo LossFluorescent Antibody TechniqueCartilageCleavage Stage, OvumSomitesCoturnixFertilization in VitroNeural CrestBlastomeresPregnancyLathyrismRhombencephalonExtraembryonic MembranesZebrafishRNA, MessengerChimeraEmbryo DispositionZygoteMorulaTranscription Factors