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19. Summarize the effect of natural selection on the evolution of populations. Use the term “fitness” in your explanation. Investigation 3: Non-random Mating Return all the parameters to the default settings. 20. Change the strength of the “assortative mating” parameter to 1 and run the simulation for 50 generations. Describe what happens. What effect does this have on the population genotypes? 21. Restart the simulation, with “assortative mating” set to -1, and run for 50 generations. Describe what happens. What is the effect on the population genotypes? 22. Describe the effect on the genotype frequencies in the population. Investigation 5: Population Size Return all parameters to the default settings. Change the “initial population size” parameter to 100. Restart the simulation and run for 100 generations. 23. What effect does this have on the population genotype frequencies?
Return to the default settings. Change the following parameters and run for about 25 generations.
Carrying capacity: 25 Genotype relative fitness rr: 0.5 Pause the simulation, butdo not restart it. Change the carrying capacity back to 200 and fitness of rr to 1, and run for another 100 generations. 24. You have just simulated a population bottleneck. Describe the effects on the population.