Biology 1002B Lecture Notes - Lecture 24: Experimental Evolution, Red, Mutation Rate
3 Apr 2016
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Studies of evolution are constrained by 2 facts: most organisms evolve slowly we are always evolving, can"t go back in time to examine ancestral forms. See how organisms changed since they last shared a common ancestor. Flask of bacteria and want to see how it evolves over time. Want a sub-population to evolve and want to compare that to the ancestor (the culture it evolved from) Enables us to differentiate 2 populations of cell. Make the red population evolve (low ph, use uv light, x-rays, etc enough to get adaption from the population) to 2000 generations and leave the ancestral population alone. Could"ve evolved either population, red colour is neutral. Could freeze the ancestral population and compare after other population evolved. Measure adaptation: mix the ancestral population with the evolved and put them into low ph for a couple days. Can measure relative fitness and look at growth rate of the evolved and ancestral trait.
