• Chapter 3: Evolution, Heredity, and Behaviour
• Psychology is the study of human behaviour
• A lot of human behaviour can be traced back to issues in context from many
years ago and we still carry these issues forward.
• People behave as they will.
• Behaviour that result in genetic code being passed on will become more
• The more genetic info you pass on the more influence.
• Ultimate causes- behaviors’ that carry on from a long time ago – women are
attracted to big strong men
• Proximate causes- things that relate more to the immediate environment- women
attracted to the money makers, ie) Bill Gates
• Darwin is noted as the father of evolution but there was a lot of notions in
geology and Darwin had this in mind when he came up with his idea of evolution.
• Survival of the Fittest- those who fit best with their environment are the best
• Artificial Selection – breeding – two thoroughbreds picked to breed together to
produce the fastest colt
• Artificial Selection allowed people to be able to pick certain traits and personality
• Natural Selection- not a random selection- one animal or person looks for
certain traits in its mate.
• Helps carry on certain traits in a species
• Began collecting data to support his theory of natural selection … but did not
publish his ideas or data for 20 years … until prompted by finding out that
somebody named Wallace had a similar theory
• Ended up publishing a book together.
Premises of Evolution
• the creation of the human form, we came to be the way we are through a gradual
• no static world, the world is always changing
• similarities of the whale fin to the human hands and feet.
• The variability you see with your eyes is not always the genetic make up
• Alcoholism- if the grandfather and the father have it then the son will have a
genetic pre disposition towards alcohol, this does not say they will become an
alcoholic but they have a greater chance to turn to alcohol when it is present
Genetics and Heredity
• Genetics did not exist when Darwin came up with his theory of evolution
• Heredity is a very general term
• Genetics refers to a much more specific process
• People are not born with a blank slate, they are already born with a genetic
• Everyone has varying resistances to chemical because of the variability produced
• Variability is good but also bad.
• Depending on the genes you have depends on how you taste things or see