BIOL 3040 Chapter : BIOL 3040 Ch 7 LO
Document Summary
Individual-level thinking: what gametes and offspring are produced and in what frequencies (only look at the parents" genotypes) (random) If a1 is dominant, its initial increase in frequency is the most rapid, but its pace slows once it is common in the population. If a1 and a2 are codominant, then a1 reaches fixation the fastest. The a1a2 heterozygote has a lower fitness than either the a1a1 or the a2a2 genotype and natural selection will favor one allele over the other but which allele that becomes fixed depends on where the population starts. This means that each phenotype is favored once it becomes sufficiently common in the population. This means that each phenotype is favored when it is rare. Ex: african fish that attack prey from either the left or right; more rare gets more food. Mutations are generated randomly with respect to the organism"s fitness.
