Biology 1001A Lecture Notes - Lecture 17: Species Problem, Allopatric Speciation, Kin Selection
19 Feb 2016
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Individuals have overlapping, but not identical, genetic interests with relatives: asymmetry in relatedness disagree over when helpful behavior is appropriate. To you, your sibling"s offspring are half as valuable as your own. To your parents, your sibling"s offspring and your offspring are equally valuable. To your sibling, their offspring are twice as valuable as yours. Not all self-sacrificing behavior is aimed at relatives. Each player has to choose: cooperate with partner (stay silent, defect on partner (blame them for the crime) o. Solving the prisoner"s dilemma: selection can favour helping non-relatives if they later reciprocate. Prevalence of apparently self-sacrificing behaviours is puzzling. Even when genetic interests overlap they can be different enough to induce. Many altruistic traits can be explained by shared genetic interests; others by conflict reciprocity. Without speciation, there would only be one species on earth (could look different than luca through evolution)
