Mechanisms of Evolution
Evolution is the gradual change that can be seen in a population’s genetic composition, from one generation to the next. The three main mechanisms of evolution include genetic drift, mutation and natural selection. The first part concentrates on Genetic Drift with the use of a model to demonstrate its effect on small and large populations. An example will also be used to explain how Genetic Drfit can lead to the formation of a new biological species over a long period of time. Then models of Mutation and Natural Selection are demonstrated and the results carefully tabulated and analysed. Examples of particular populations, which have likely evolved through each mechanism, are also highlighted.
Production Year: 2004
Duration: 28 min
Printable Resources: Yes
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