IGCSE›Oxford AQA IGCSE Biology›Mind mapsCell divisionOxford AQA IGCSE Biology: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsCell cycleG1: growth, organelles copiedS phase: DNA replicatedM phase: mitosis and cytokinesisInterphase is most of the cycleMitosis stagesProphase: chromosomes condense, envelope breaksMetaphase: line up at the equatorAnaphase: sister chromatids pulled apartTelophase: nuclear envelopes reformUses of mitosisGrowth of multicellular organismsRepair and replacement of cellsAsexual reproductionTwo identical diploid cells madeCell divisionmitosis and meiosis2nnMeiosisTwo divisions, four cells madeChromosome number halved: diploid to haploidMakes gametes in reproductive organsCells are genetically differentVariationIndependent assortment of chromosome pairsCrossing over swaps genetic materialFertilisation restores diploid numberExam tipsDNA must replicate before mitosisMitosis: 2 identical cells; meiosis: 4 different cellsMitosis in body cells, meiosis only in gametes