OogenesisGene Expression Regulation, DevelopmentalEmbryonic DevelopmentDrosophila ProteinsOocytesEmbryo, NonmammalianDrosophilaOvaryDrosophila melanogasterPlant Somatic Embryogenesis TechniquesGenes, InsectIn Situ HybridizationInsect ProteinsVitellogenesisGerm CellsOvumMolecular Sequence DataEgg ProteinsBody PatterningEmbryonic and Fetal DevelopmentMorphogenesisAmino Acid SequenceAnimals, Genetically ModifiedRNA, MessengerBase SequenceMutationEmbryo, MammalianTranscription FactorsXenopus laevisZygoteZebrafishOvarian FollicleXenopus ProteinsInsect HormonesCaenorhabditis elegansPhenotypeSequence Homology, Amino AcidMeiosisGenes, LethalGastrulaCaenorhabditis elegans ProteinsHomeodomain ProteinsRNA, Messenger, StoredRNA-Binding ProteinsCloning, MolecularCell DifferentiationZebrafish ProteinsSeedsSpermatogenesisLarvaDNA, ComplementaryMesodermEgg ShellSignal TransductionXenopusDNA-Binding ProteinsCell PolarityTransforming Growth Factor alphaFertilizationBlastocystNervous SystemGene ExpressionNuclear ProteinsTransforming Growth FactorsGenes, HomeoboxTranscription, GeneticGonadsSea UrchinsUrochordataMeiotic Prophase IGametogenesisPleurodelesBlastodermFertilitySequence AlignmentCytoplasmReceptors, NotchImmunohistochemistryRNADisorders of Sex DevelopmentCytoplasmic StreamingCell NucleusStem CellsEndodermEmbryonic InductionAllelesEctodermCell LineageGenes, HelminthModels, BiologicalTissue DistributionDNA PrimersOogoniaTrans-ActivatorsVitellogeninsBlotting, NorthernChick EmbryoMembrane ProteinsCrosses, GeneticReverse Transcriptase Polymerase Chain Reaction