BIOL 123 Lecture Notes - Lecture 11: Clonal Selection, Zygosity, New Mutants
Document Summary
Genetics complicates the action of natural selection. Get new mutations into the bacterial population, and if there is a mutation with a higher fitness, it will spread into the population. Single genotypes take over whole populations, as one has to be better than the other (competition) Small microbes due well as they have high population rates. Easy to introduce mutants (bad, but some are good) Random mutations in our genetic code, as our genome is doing something. Purifying selection important, and if there is a change, you can screw it up more rather than making it better. Low fitness, and is eliminated from the population. Getting rid of something bad, in terms of natural selection and fertility. Selection in asexual populations increases mean fitness until the variance in fitness is used up. Outcome of selection, and calculate net reproductive success. Net reproductive success: probability of surviving to reproduce x number of offspring being produced.
