22. Mate Choice causes
Sexual Selection
Intrasexual: traits that give a
competitive advantage
Intersexual: traits that are preferred
by the chooser sex
26. Mating systems Jacana
Polyandry: multiple males
Polygyny: multiple females
Promiscuous: multiple males & females
Monogamy: one male, one female
Elephant seal Dunnock
Black vulture
42. "Would I lay down my life
to save my brother?
No, but I would to save two
brothers or eight cousins.”
-J.B.S. Haldane
Siblings: share 1/2 of your genes
Cousins: share 1/8 of your genes