Biology 1001A Lecture Notes - Lecture 18: Liger, Genetic Drift, Asexual Reproduction
25 Feb 2016
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Even between close relatives there is the possibility of conflict. Whatever sibling you produce will be twice as valuable to you (0. 5) as your siblings children: you should only help your siblings only if their benefit is far greater than the risk you (0. 25) take. For your parent, both siblings are equally valuable. Hamilton"s rule can also explain conflict in families. Not example of true altruism because increasing your own fitness indirectly. Not all self-sacrificing behavior is aimed at relatives . Vampire bats sometimes help unrelated members of the species. Maybe losing fitness themselves: true altruism. Each person cannot communicate with their partner and can either cooperate or defect and as a result there is a payoff matrix. It would make more sense rationally to defect because you either get 0 or 8 in terms of minimizing jail time. Repeated interactions between individuals will tend to increase self-sacrificing and helpfulness even when you are not related.
