PSYCH 2B03 Lecture Notes - Twin Study, Panmixia, Behavioural Genetics
18 Mar 2013
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Document Summary
Biological bases of personality interested in quantitatively in describing biological bases. What are the biological factors and how much of an impact do they have on personality: nature vs. nurture (relative importance) Makes them more different: even in a family, children may have different teachers, treated differently by parents, other after school activities non-shared environment experiences becomes even greater siblings move away for school. Monozygotic: zygote splits into two and they develop individually (share the same genes since they came from the same zygote) 100% identical in genotype (does not mean they are 100% identical genetically though) Dizygotic (fraternal, non-identical): developed separately from 2 eggs. Share roughly 50% of their genome in common: no more similar genetically than any siblings are. Their genetic similarity is known , use this to asses impact of genetics/environment. Compare mz twins who are raised together vs. twins who were raised apart.
