PSYCH 1XX3 Lecture Notes - Lecture 2: Semen Quality, Psych, Parental Investment
Document Summary
The main focus is how may copies of genes you pass on to the next generation. Sexual selection: the evolution of characteristics not because of survival but because of mating advantages. Intra sexual competition: member od the same sex compete with each other and the winners gain mating access to the opposite sex. Intra-sexual competition: members of one sex prefer certain qualities inmates. Peacocks: long tail doesn t help in survival it is actually quite detrimental. Reproductive success is in correlation to voice pitch, the lower pitched voice tend to leave behind more children in the next generation. Is not a direct advantage to survival, but it is considered more attractive, so this person leaves behind more copies. Voice pitch is heritable, and it influences (solely) buy testosterone. Most females like a lower pitched voice. Testosterone actually weakens the immune system and correlated with lower semen quality. Voice pitch is the human version of the peacock tail.
