SpermatocytesSpermatogenesisSpermatidsDiploidyTestisMeiosisPachytene StageSertoli CellsSpermatogoniaSpermatozoaSeminiferous TubulesSeminiferous EpitheliumHaploidyMeiotic Prophase ISynaptonemal ComplexPloidiesProphaseChromosome PairingChromosomesBlood-Testis BarrierInfertility, MaleTetraploidyTriploidyGerm CellsSperm CountSex ChromosomesMetaphaseDipteraLeydig CellsFertilityY ChromosomeAneuploidyMolecular Sequence DataSex ChromatinTriethylenemelamineBase SequenceCell NucleusRNA, MessengerSalamandridaeMutationOligospermiaIn Situ HybridizationImmunohistochemistryEpididymisOrthopteraKaryotypingNuclear ProteinsGene Expression Regulation, DevelopmentalGrasshoppersRecombination, GeneticOrgan SizeIn Situ Hybridization, FluorescenceOncogene Proteins v-mosAmino Acid SequenceMitosisCryptorchidismSexual MaturationCrosses, GeneticAnaphaseMicroscopy, ElectronHistonesCyclin A1Crossing Over, GeneticGametogenesisHybridization, GeneticChromosome MappingTestosteroneDrosophila melanogasterRats, Sprague-DawleyEthylene GlycolsDNADrosophila ProteinsAcrosomeCentromereSpindle ApparatusGene ExpressionGenome, PlantCells, CulturedBlotting, NorthernPhenotypeIn Situ Nick-End LabelingChromosome AberrationsContraceptive Agents, MaleSaccharomyces cerevisiaeGravity, AlteredX ChromosomeFibroblastsCell Cycle ProteinsAllelesCytokinesisTesticular DiseasesChromosome SegregationAndrogen-Binding Protein