Psychology 1000 Lecture Notes - Lecture 13: Parental Investment, PromiscuityPremium
Course CodePSYCH 1000
ProfessorLaura Lyn Fazakas Dehoog
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Psychology 1000 – Lecture 13
Professor Fazakas-Dehoog Section: Psychology 1000 002
Chapter 3 Continued
• What are the environmental conditions needed for the full development of this
• What internal mechanisms are involved in producing this behavior?
• What consequences does this behavior have in the individual’s daily life?
• In the course of evolution, why would the genes that make this behavior possible
have been favored by natural selection?
• Homologies: similarities due to common ancestry
– Useful for studying underlying mechanisms and for tracing the
evolutionary course of species-typical behaviors, exemplified by research
on the greeting smile and happy smile in humans
• Analogies: similarities due to convergent evolution (independent evolution of
– Useful for inferring distal functions
Evolutionary Analyses of Mating Patterns
• Mating is what drives evolution
• Four classes of mating arrangements
Monogamy – male and female
- Very common – especially in birds.
Polygyny – one male and many females
- Bull seals
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