Hare19 - The assumptions of the HardyWeinberg Theorem Very...

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The assumptions of the Hardy- Weinberg Theorem Very large population size No migration No net mutations Random mating No natural selection Deviations from expected values indicate that one or more assumptions are violated .
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The Causes of Microevolution Microevolution is the a generation to generations change in allele frequency Factors changing allele frequencies are: – Mutation – Non-random Mating –D r i
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MUTATION A MUTATION is a change in an organism’s DNA Mutations are rare (10 -5 genes per generation) and do not in themselves make a large change in allele frequencies BUT mutations are the ultimate source of variation
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MUTATION Only mutations in the germ line are passed on Mutations are random Most point mutations are probably relatively harmless – (because they change non-coding DNA) – Redundancy But point mutations can be harmful (e.g. sickle cell) Mutations that affect function are most likely to be harmful
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MUTATION In micro-organisms mutations are of immediate
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Hare19 - The assumptions of the HardyWeinberg Theorem Very...

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