PSY BEH 100 Lecture Notes - Lecture 2: Inclusive Fitness, Hominini, Wisdom Tooth

• School: UC-Irvine
• Department: Psychology and Social Behavior
• Course: PSY BEH 100
• Professor: Shariff

Document Summary

You inherit genes from parents, split & combine, differential survival. Variation within a population (some people will have selective advantages) Selection among the variation (fit traits to be passed down) Gregor mendel"s discovery of genetics (1866, rediscovered 1900) Evolution by sexual selection selection mechanism is different: differential reproduction (higher representation of certain genes than others) ^both of the aforementioned methods use the mechanism of change in gene frequency. Cultural evolution (operates through same darwinian evolution) Cultural elements vary, culutral elements are passed down and across generations, some things are learned/ others forgotten. Each of us has at least 100 genetic mutations (transcription errors, environmental events) Things that get passed down to our offspring. Fitness-inert neutral (not really going to affect survival or reproductive ability) A random mutation that causes fitness benefits is an adaptation. Oxytocin - cuddle hormone; initially evolved in women to help them bond with children -