Speciation 3.5 / 5 based on 2 ratings ? BiologyDNA, genetics and evolutionASOCR Created by: RCreated on: 24-03-13 09:57 Allopatric speciation Geographical separation An outside source effects breading of a speices, Great distance, or a actual barrier (river or desert) Each section may evolve changing characterstics creating two new speices. 1 of 2 Sympatric speciation Reproductive barrier Most commonly through polyploidy; offsprind have twice the normal number of chromosomes creating reporductive isolation Same habitat but genetically different Prevents fertiallization from happening Premating or Postmating (not mating at right time) 2 of 2
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