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Unformatted text preview: Biology 1M03 Lecture- Jan. 13. 2011 19:30- Alleles and drug resistance, person with TB was admitted to hospital. After lung sample there are two bacteria samples. There is blue and red sample.- a mutation happened that led to these two populations. A change in the environment led to the mutation. - drug therapy is very effective at stopping the red population from reproducing, so the red ones are then cleared and their population becomes very small.- An environment can certainly induce a mutation. The change in the environment changes everyone’s fitness. The normal type have a low fitness when the drug is given but the blue mutant form tends to take over since it is unaffected by the drug. The doctors don’t assume that the change in the environment led to a mutation and give him the same drugs again. The drug as we know is not effective towards and give him the same drugs again....
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