PSYC18H3 Lecture Notes - Lecture 2: Depth Perception, Ultimatum Game, Advantageous
Document Summary
Precursors to darwin"s theory: jean baptiste lamarck; naturalist (1744-1829) Not only could you inherit genotypes but also phenotypes: charles lyell; geologist (1797-1875) The earth has been shaped by forces that are still active today. The world is constantly evolving and is continually evolving today: thomas malthus; economist (1766-1834) Population growth is kept in check by various vices. People able to survive vices (e. g. , illness) are more likely to survive. Charles darwin (1809-1882: observations during expedition to the galapagos islands, observed slight variations in finches" beaks, depending on their island of origin. Beaks varied based on the seeds the birds ate: changes that occurred over time, natural selection. Selection pressures: environmental factors that favor certain genes over others. Goal is to pass on our genetic code. Achieve this goal through survival, reproduction, and child care: sexual selection. Making it to sexual maturity leads to survival. Choosing and securing best possible mate for reproduction.
