Septo-Optic DysplasiaBlastodermHypopituitarismChoristomaEmbryo, NonmammalianDrosophilaGastrulaBody PatterningBlastodiscDrosophila ProteinsDrosophila melanogasterGene Expression Regulation, DevelopmentalChick EmbryoGenes, InsectTriboliumCranial Fossa, PosteriorMorphogenesisInsect ProteinsCoturnixQuailHeteropteraZebrafishOrganizers, EmbryonicFushi Tarazu Transcription FactorsHomeodomain ProteinsBlastulaVitelline MembranePosterior Cerebral ArteryInsect HormonesNodal Signaling LigandsCleavage Stage, OvumIn Situ HybridizationEmbryonic InductionPosterior Cruciate LigamentMesodermTranscription FactorsZebrafish ProteinsGerm Cells