GSU PSYC 1100 - Psychology Exam 2 Study Guide (14 pages)

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Psychology Exam 2 Study Guide



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Psychology Exam 2 Study Guide

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Pages:
14
School:
Georgia State University
Course:
Psyc 1100 - Intro to Biopsyc

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Biological Psychology Exam 2 Study Guide Fall 2017 READ POWERPOINTS Lecture 5 Reproduction and Sexual Selection Secondary sexual characteristics o Traits that serve no purpose in survival per se but reflect competitive ability and attractiveness to mates Charles Darwin Appear around puberty Sexual selection o A form of natural selection acting on variation in the ability of individuals to compete with others of their sex and to attract members of the opposite sex Competition over access to mates Stronger in males Selection for choice of mates Stronger in females o Idea common e o Type of natural selection that is used to explain attractiveness and competition to mates Male male competition o Greater variation in reproductive success than females o The losers lose big time o Males are less choosy o Males competition for access to female Strong Female choice o Females bear the energic burden of pregnancy and lactation o Reproductive potential The maximum number of offspring an individual can produce Lower in females than in males o Female choosing mates Strong Variation in reproductive success o Passing of genes onto the next generation in a way that they can also pass on those genes Higher in males than females o Higher in males vary in species and population o Reproductive successes amount of offspring o Greater variation more male male competition Males are larger than females o Currency for natural selection Variation in reproductive potential o The maximum number of offspring an individual can produce Lower in females than in males o Higher in males than females variants Operational sex ratio o m Sm f Sf M number of males Sm period when males are ready to mate F number of females Sf period when females are ready to mate Predicts greater male male competition o The number of sexually active male over sexually active female Higher higher competition Lower low competition o Predicter of male male competition o Related to polygamy Mating systems o Monogamy One partner o Polygamy multiple partners Polyandry One female mates with more than one male Polygyny Males mate with multiple females Promiscuity General and culturally loaded term for having multiple sexual partners Polygyny threshold model o Monogamy and polygyny as related to habitat quality Fitness and territory quality Fitness is how well something is doing o Offspring survival reproductive success Amount of habitat quality increase that is required to increase or equate the fitness of the monogamous or polygynous female o Gordon O Ryan Reproductive fitness with habitat quality First or second mate If a female is sharing a territory with a male and another female if habitat quality is high you can increase fitness The equal of habitat and fitness Sexual dimorphism o When the sexes differ in body or canine size o Usually males are larger o Provides an indirect indicator of the degrees of effective polygyny or the amount of male to male competition o Body size is greatest in single male



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