Biology 1001A Lecture Notes - Lecture 17: Allopatric Speciation, Sympatric Speciation, Speciation
1 Nov 2015
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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, kin selection often improves fitness. Human emotions and language: mechanisms for social scorekeeping, language. Cooperation and conflict: 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. No way for genes to connect with each other. Species end up looking very different, different genes. Become reproductively isolated after a while: secondary contact (may or may not occur) May resume interbreeding if not genetically isolated yet. May have become reproductively isolated (speciation has occurred)
