BIOL 105 Lecture Notes - Lecture 8: Effective Population Size, Genetic Drift, Neutral Theory Of Molecular Evolution
Document Summary
Often the distribution if you grabbed a handful or marbles, it would not be the same! Inevitably: keep in mind, for any given species, most of the variation for individuals, are not applicable to their fitness, example: most of the features in humans, don"t increase their fitness to do better in the population. They"re simply phenotypes: genetic drift is dramatically influencing the phenotypes of organisms/people! Fixation: when a certain variation/alle has become the only available allele, all competing alleles have been wiped out, probability of fixation of any allele, when looking at the equation, they may ask about certain individual abbreviations! If we pull out 10 marbles out of 100, they will be more variable! Compared to if we pulled out 50 marbles. Smaller the population size - the more shifts will occur - the closer you are to fixation!
