PHL357H5 Lecture Notes - Lecture 7: Mars Cube One, Body Plan, Genetic Drift
Document Summary
This question requires us to distinguish between groups and within groups. Selfish strategy: the organism does not devote any fitness. Altruist strategy: occasionally devotes some fitness: randomly devotes certain mount of fitness. Table 4. 2 (has two explanations: between group: group 2 grows faster than group 1, within group: looks at the global population. Cheap individualism: does not talk about between group population, but talks about within group: this means that whoever is fitter will increase in proportion thus altruists are fitter, says that altruist fitness is higher than selfish fitness duh! You have a group where an altruist or a selfish person invades but the fitness remains stable. William"s idea of group selection is only applicable to small populations and occur at random: the only relevant effect of between groups is that the larger group always has a larger chance of going extinct. Sloan wilson"s idea of group selection involves altruist and selfish groups.
