PNB 2XC3 Lecture Notes - Lecture 7: Speciation, Coevolution, Naked Mole-Rat

• School: McMaster University
• Department: Psychology, Neuroscience & Behaviour
• Course: PNB 2XC3
• Professor: Reuven Dukas

Document Summary

Depends on number of offspring that she will save (direct fitness) Sometimes it is more optimal for a sibling to help raise their siblings rather than produce their own offspring. Helping is beneficial if it results in more than twice as many additional siblings than the individual can raise alone. Inclusive fitness of an allele is its effect on the fitness of the individual that carries it (direct fitness) and other individuals that carry that same allele (indirect fitness) An action should increase in frequency if the benefit (b) received by the donor"s relatives, weighted by their relatedness (r) to the donor, exceeds the direct fitness cost (c) to the donor. The fraction of genes that are identical by decent (inherited from a common ancestor) Males hover above the water and then dive down to catch fish to give to the females. Attack humans that approach their nest: willing to sacrifice their life for their babies.