PSYC 3100 Chapter 3: Chapter 3.docx

• School: University of Guelph
• Department: Psychology
• Course: PSYC 3100
• Professor: David Stanley

Document Summary

Hamilton devised a method for predicting when altruistic behavior is likely to be selected, depending upon the degree of genetic relatedness between the two individuals involved: rb> c ; selection of this behavior will occur if the fitness cost to the altruist is less than the benefit to the relative multiplied by the probability that the relative possesses the same gene (r ) kin selection particular important to the study of bees, sisters are therefore more closely related to each other than in animals lacking this form of sex determination, and sisters may actually pass on more of their genes by helping to raise female siblings (with a degree of relatedness of ) than by raising their own offspring (with degree of relatedness of ) inclusive fitness capture the idea that the reproductive success of an individual depends not only on how many offspring it has but also on the extra fitness it can gain by helping relatives.