PSYC 1101 Notes (3 6)

PSYC 1101 Notes (3 6) - 3/6/08 PSYC 1101 Prenatal...

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3/6/08 PSYC 1101 Prenatal Environment Influences: 1. Physical sex characteristics 2. Sex-typed behaviors vs. gender roles (androgynous) 3. Sexual orientation Fraternal twins = different genotypes; Identical Twins = same genotypes Birth order for males is one of the best predictors for homosexuality. The more males that are born, the younger one's are more likely to be gay (1 st – least; 2 nd – more likely; 3 rd – most likely) Sexual Identity B. Behavioral Genetics -Family studies -Twin studies -Adoption studies Fraternal twins, siblings, parents = 50% Aunts, Grandparents = 25% 1 st cousin = 11.5% -Twin studies indicate genetic similarities, similar prenatal environment -Heritability – likelihood of picking someone at random and seeing whether or not they will be wearing jeans or a skirt 3/18/08 Neurology I. The nervous system a. The central nervous system – the brain and the spinal cord b. The peripheral nervous system 1. the somatic nervous system (skeletal) – the nerves related to voluntary movements of
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PSYC 1101 Notes (3 6) - 3/6/08 PSYC 1101 Prenatal...

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