BIOLOGY 1M03 Chapter Notes - Chapter Chapter 26: Zygote, Meiosis, Mitosis
17 Jan 2017
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If gene glow ends, allele frequencies in isolated populations are free to diverge: this means that the populations begin to evolve independently of each other. If mutation, selection and genetic drift cause isolate populations to diverge sufficiently, distinct types or species, form - the process of speciation takes place. Characteristics differ among species because their genetic characteristics differ. Genetic differences take place because of mutation, selection and drift acting on species independently. Species: an evolutionarily independent population or group of populations. Crieteria to identify species: the biological species concept, the morphospecies concept, the ecological species concept, the phylogenetic species concept, the biology species concept: The critical criteria for identifying species is reproductive isolation: believe this is logical because no gene flow occurs between populations that are reproductively isolated from one another. Reproductive isolation can result from a wide variety of events and process.
