Chapter 13 T3-T6 - Chapter 13 Topic 3 - 6 23/01/2008...

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Chapter 13 Topic 3 - 6 23/01/2008 10:03:00 Some Kinds of evolution are not driven by selection Genetic drift – genetic changes in a small population due to chance Bottleneck Effect – genetic drift due to drastic reduction in population size Topic #3 DNA and Evolution Mutations are the ultimate source of all variation o Mutation – change in the genome Change in populations are expected because o DNA controls construction and operation of organisms o DNA instructions change (mutation) Topic #4 Processes of Science What is Fact? Can something that is considered a fact today be shown to be incorrect  tomorrow? Is the earth round? Does it bother you that you have not personally seen Earth from space? Do you trust the photographic evidence? Why or why not? How does reasonable doubt factor into all of this?
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Chapter 13 T3-T6 - Chapter 13 Topic 3 - 6 23/01/2008...

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