BIOL 2400 Chapter Notes - Chapter 6: Peptide, Heterosis, Apostatic Selection
Document Summary
Population genetics natural selection: one assumption of the hwt is that individuals do not differ in their ability to survive and reproduce b/c of their genotype. In nature, we find that genotypes do differ in their ability to survive and reproduce: the differential survival and reproduction is known as natural selection. In order to see how natural selection can cause evolution mathematically, we must consider the concept of relative fitness. Relative fitness is the survival and/or reproduction of a genotype (or phenotype), relative to other genotypes (phenotypes) in the population. Components of fitness: survival to reproductive age, mating success, fecundity. In general, relative fitness refers to the average for a particular genotype: an individual can either survive or not. Until it gets to p^, it is evolving this evolution by natural selection. Only b/c the differences in the fitness of the individual. If f = anything other than 0, this means inbreeding.