Down SyndromeDNA Breaks, Double-StrandedNuclear EnvelopeModels, BiologicalDNA RepairDNA Breaks, Single-StrandedTime FactorsMicroscopy, ElectronBiological EvolutionMolecular Sequence DataDNA DamageMitosisMicrotubulesMutationKineticsEscherichia coliComputer SimulationModels, TheoreticalCell NucleusTemperatureCattleSpecies SpecificityAmino Acid SequenceCells, CulturedOocytesBacteriaProtein BindingSignal TransductionHydrogen-Ion ConcentrationBacterial ProteinsCalciumAlgorithmsRecombination, GeneticChromosome BreakageDNA-Binding ProteinsDNAAntigens, NuclearComet AssayRad51 RecombinaseDNA End-Joining RepairGamma RaysAtaxia Telangiectasia Mutated ProteinsEndodeoxyribonucleasesDNA, Single-StrandedDNA Repair EnzymesDNA LigasesCell Cycle ProteinsRadiation, IonizingHistonesNuclear ProteinsRecombinational DNA RepairHomologous RecombinationDNA HelicasesExodeoxyribonucleasesMeiosisGenomic InstabilityPoly(ADP-ribose) PolymerasesSaccharomyces cerevisiae ProteinsDeoxyribonucleases, Type II Site-SpecificDNA ReplicationCell LineSaccharomyces cerevisiaeProtein-Serine-Threonine KinasesGene ConversionEndonucleasesChromosome AberrationsDose-Response Relationship, RadiationDNA, FungalRad52 DNA Repair and Recombination ProteinX-RaysChromatidsUltraviolet RaysTumor Suppressor ProteinsChromosomes, Human, Pair 21Cell SurvivalSister Chromatid ExchangeZinostatinCell CycleDNA Topoisomerases, Type IICell Line, TumorModels, GeneticChromatinChromosomes, FungalMutagensMethyl MethanesulfonateHeLa CellsChromosome PairingTelomereTopoisomerase II InhibitorsTranslocation, GeneticCricetinaePlasmidsChromosomesPhosphorylationBleomycinRNA, Small InterferingFibroblastsGene Knockdown TechniquesPrenatal DiagnosisRNA Interference