PSY352H5 Lecture Notes - Lecture 3: Disruptive Selection, Directional Selection
Document Summary
When medication stopped for hiv patients, y-type of hiv virus population grows and hiv population w/ mutation against drugs gets selected out: this delays progression of virus, does not cure individual. Bacteria more successful than us in terms of biomass (largest in world), # of habitats, species diversity: bacteria have been around for 3. 5 billion yrs, vs. 10% of our total body mass is made of bacteria. Bacteria have not been thru as much evolution as compared to humans: not getting more complex. Reproduction only thing that counts in the evolutionary process. There is no predetermined direction/ purpose even tho it looks like evolution is moving towards a goal. Selection is meaningless if there is no genetic variation. Passing genes to the next generation can involve multiple different strategies. If you carry a mutation that makes you able to pass it on to the next generation then it will be more frequent.
