Biology 1001A Chapter Notes - Chapter 16: Inclusive Fitness, Blood Sugar, Fetus
27 Jan 2020
School
Department
Course
Professor
Document Summary
Lecture 16: cooperation and conflict: selection is fundamentally competitive, even apparently self-sacrificing behaviour are widespread, types of social interaction, 1. Recipient fitness increases, actor fitness increases=cooperation, actor fitness decreases=altruism: 2. Direct fitness-how many copies of alleles make it to next generation from direct descendants: 2. Indirect fitness- helping relatives to survive who would not survive without your help: 3. Inclusive fitness- the sum of direct fitness+ indirect fitness. If benefit to the actor"s indirect fitness outweighs the cost to the actor"s direct fitness, behaviour favoured by kin selection: explains many apparently-altruistic behaviours, hamilton"s rule: helpful behaviours favoured if rb>c, 1. Multiplied by degree of relatedness, r: 3. Does this outweigh cost c to actor"s direct fitness: asymmetry in relatedness-> disagree over when helpful behaviour is appropriate- Brother asks you to help whenever b>c/2: conflict between close relatives begins even before birth!
