Biology 1001A Chapter Notes - Chapter 47: Reciprocal Altruism, Gray Wolf
17 Dec 2017
School
Department
Course
Document Summary
Half siblings share- 0. 25 of alleles so degree of relativeness r= 0. 25. *likelihood that 2 siblings would get same allele from mom is 0. 5x 0. 5 chance. Kin selection: individuals should be more likely to help closer relatives because more of your alleles will be propagated. A male grey wolf helps his parents rear four pups to adulthood, pups that would have died without the extra assistance he provided. The pups are his younger full siblings, sharing 0. 5 of his genes, so rb= (0. 5x4) . However, if he had found a mate, sired offspring, and raised two of them, each would have carried half of his alleles, In this situation, rb>c, so the . male wolf should help parents. Hamilton"s idea is not altruistic because it demonstrates why parental behaviour/ helping parents raise siblings is selfish. Reciprocal altruism (trivers): individuals will help nonrelatives if they are likely to return favour in future, each partner from relationship will benefit.
