Embryo, MammalianChick EmbryoYolk SacGene Expression Regulation, DevelopmentalEmbryonic and Fetal DevelopmentIn Situ HybridizationMorphogenesisEmbryo, NonmammalianEmbryonic DevelopmentMesodermDevelopmental BiologyTissue DistributionGestational AgeEndodermEctodermAminomethyltransferaseMolecular Sequence DataGastrulaCell AggregationPregnancyBase SequenceNeural CrestExtremitiesRNA, MessengerCell DifferentiationPlacentaQuailNervous SystemMesonephrosAmino Acid SequenceTrophoblastsNotochordBlastocystBody PatterningCoturnixImmunohistochemistryOrgan SpecificityXenopus ProteinsHomeodomain ProteinsTranscription FactorsFetal ProteinsCloning, MolecularXenopus laevisEmbryonic InductionViscosityDNA, ComplementaryEpitheliumZebrafishFetusEmbryo ImplantationFluorescent Antibody TechniqueXenopusCentral Nervous SystemDigestive SystemGene ExpressionChickensCells, CulturedKidneySequence Homology, Amino AcidReverse Transcriptase Polymerase Chain ReactionDNA PrimersMice, Inbred C57BLGenomic ImprintingDNA-Binding ProteinsEmbryonic Stem CellsMice, Inbred CBAGenes, HomeoboxZebrafish ProteinsSignal TransductionSeedsEyeHedgehog ProteinsTime FactorsBlotting, NorthernElasticityDrosophilaCell LineageModels, BiologicalSequence AlignmentMice, Inbred StrainsGene Expression ProfilingDNACell LineCell MovementLiverCulture TechniquesPhenotypeRNADrosophila ProteinsMice, TransgenicMusclesUterusAlternative SplicingBone Morphogenetic ProteinsStem CellsBrainHeartTranscription, GeneticSequence Homology, Nucleic AcidTrans-Activators