bio102 lecture 1-23 - Lecture Notes Sociobiology Mate...

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Lecture Notes 1/23/08: Sociobiology/ Mate choice (Ch 32: pp. 581, 588-589, 594-596 ) Sociobiology Humans clearly culturally complex, BUT- might human behavior have biological/ evolutionary basis? Originally very controversial no genes for behaviors per se Not an “excuse” E.g,. Rape, murder Humans can’t be reduced to being “programmed” BUT, provides useful insights why we may behave the way we do Sociobiology/ mate choice outline Ever wonder how we choose mates? What do we find attractive? What do men want? What do women want? Is there a biological/ evolutionary basis? Sociobiology as a discipline What features do we find attractive in a mate? Symmetry is important! e.g., Denzel has almost perfectly symmetrical face (“Sexiest Man Alive” 1996- People) Both men an women prefer symmetrical faces Symmetry in other animals o Scorpion flies females prefer males w/more symmetrical wings (even when hidden – smell better) o Sword tails – Females chose symmetrical (same number bars on both sides) males over asymmetrical males When reversed (bars frozen off with dry ice) females chose more symmetrical male!
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