Wize University Psychology Textbook > Genetics & Evolution
Sexual Selection
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Sexual Selection
Natural selection is really about surviving until sexual maturity and having the opportunity to mate and pass on heritable characteristics.
Intrasexual competition - competition between members of the same sex, with the winner being able to mate with a member of the opposite sex.
Example: aggressiveness or antler size in animals.
Qualities that lead to success in intrasexual competition are more likely to be passed down.
Intersexual selection - selection of particular characteristics in members of one sex by members of the opposite sex. These characteristics are then more likely to be passed down.
Example: colourful feathers in birds, intelligence in humans.
Practice: Sexual Selection
A person on a dating site says they're looking for someone with a good sense of humour. This is: