BIOL 3300 Lecture Notes - Coefficient Of Relationship, Inclusive Fitness, Fledge
Document Summary
Kin selection occurs when natural selection favors the spread of alleles that increase the indirect fitness. Depending on the individuals involved, depending on the cost and the benefit. How can altruism exist if the individual carrying the altruistic allele has reduced fitness: because there could be increased inclusive fitness. Inclusive fitness includes both direct and indirect fitness. Hamilton"s rule allele for altruistic behavior will spread if: r > c/b where r=relatedness, c=cost, b=benefits. If r is less than the c/b ratio then it won"t spread: coefficient of relatedness (r) = probability that homologous alleles in two individuals are identical by descent (similar to inbreeding coefficient) Females within the colony are also related to each other. They have a larger number of family members in the colony. The males move between colonies to mate. They do adjust the alarm calls based on how related the individuals are. Offspring help raise next generation: in animals it occurs when resources limited.
