IGCSE›Oxford AQA IGCSE Biology›Mind mapsReproductionOxford AQA IGCSE Biology: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsSexualTwo gametes fuse: fertilisationTwo parents neededGametes made by meiosis, haploidOffspring are genetically variedAsexualOne parent onlyMade by mitosis, no gamete fusionOffspring are identical clonesSexual pros and consVariation allows adaptation to changeSelection and evolution can occurSlower and energy-costlyNeeds a mate, fewer offspringReproductionsexual and asexualAsexual pros and consFast and efficient, one parent enoughNeeds less energy, more offspringNo variation, cannot adaptWhole clone vulnerable to one diseaseExamplesBinary fission: bacteria split in twoBudding: yeast bud detaches as a cloneRunners: strawberry plantlets root at nodesBulbs and tubers in plantsExam tipsClones = genetically identical, not just similarLink variation to survival if environment changes