PSY-3705 Study Guide - Midterm Guide: Corpus Callosum, Mormon Cricket, Hercules Beetle

• School: Vanderbilt University
• Department: Psychology (A&S)
• Course: PSY-3705
• Professor: Smith Leslie

Document Summary

Sex and evolution: darwin"s theory of evolution a. i. Replicator makes copy of itself mistakes & mutations occur changes are inheritable # species increases as variation occurs limited resources differential survival / survival of the fittest: asexual v. sexual reproduction b. i. If one has mutation, all have mutation b. ii. Sexual give up of genes in hopes of making better model b. ii. 1. b. ii. 2. Fueled by variability / hope of having a good combo. Adapting to an ever-changing environment: 2 sexes c. i. Female large gamete, high nutrients, lots of commitment c. ii. Male small gamete, low nutrients, low commitment: sexual selection d. i. Females invest more in birth & are thus are choosing the male d. ii. Male develops signs of fitness (large, fast, toned, big dick) d. ii. 1. Seize & shape of body parts matter nature doesn"t waste resources d. iii. 1. d. iii. 2. Male gorillas don"t need large penis because have many females d. iii. 3. Larger testicle = more sperm deposited = greater likelihood of fertilization d. iii. 3. a.