PSYC 320 Lecture Notes - Estradiol, Twin Study, Twin
Document Summary
Psychology 320 lecture17: what biological theories have been proposed to explain sex differences (cont, twin studies: the best way we can examine biological traits in behaviour. It is thought that the environments are the same for all twins (mono and di) Analyzed same sex twins on traits thought to be attributed to masculinity and femininity. Participants were asked to complete an adjective checklist, occupational interests, and the frequency of everyday activities (all of these components representing gender characteristics for females and males) They found that heritability stat in masculine instrumentality was: 36% attributed to genetics, and the rest is attributed to environment. Gender diagnosticity (occupational preferences, everyday activities): 53% genetics. Gender diagnosticity: indicative of how people conform to gender roles/ characteristics: example 2. Klinefelter syndrome: an individual who is male has an extra x chromosome (xxy) A random sperm or egg has 2 sex chromosomes involving at least one x. People with this syndrome have male internal and external genitalia.
