DB3 How does evolutionary change occur in populations.docx

DB3 How does evolutionary change occur in populations.docx...

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How does evolutionary change occur in populations? What is speciation and how does it occur? Answer both questions. We know that population is a cluster of individuals of the same species or organisms who are sharing the common geographical area. So, within any population we can usually observe changes in the allele frequency over time which is the genetic variation of evolution. All of these qlleles in genetic variations are usually called a gene pool. In that gene pool the genetic variation available to the population and in natural selection and other genetically measured processes can act. But when these populations become less diverse there are less alleles in species or organisms in the population that has the potential for genetic change that does result in adaptations. This is just one of the four basic ways of evolutionary change that can occur. The four basic ways are mutation, gene flow, genetic drift, and natural selection. Which they all require the genetic variation to exist in the population to have an effect.
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  • Fall '14
  • MichelleThompson
  • Evolution, genetic variations

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