PSYC 3230 Lecture Notes - Lecture 15: Safe Sex, Ethnocentrism, Health Promotion
26 Mar 2018
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Proband: the person who has the trait of interest (ex: someone who has schizophrenia) If there is a genetic influence, expect to see the trait more in first-degree relatives compared to second degree. Familial aggregation: tendency of a disorder to run in families. Families usually live together, so similarities may be due to environmental factors as well as genetics: adoption studies. One way to separate the effects of the environment. Are adopted children more similar to their birth parents (genetics) or adoptive parents (environment): twin studies. If a trait is genetic, expect to see grater concordance in identical twins (similar environment and same genetics) compared to fraternal twins (similar environment, different genetics) Can be combined with adoption studies: if identical twins are both adopted separately and raised apart, shared outcomes are more attributable to genetics: genetic linkage and association studies. Examine known genetic markers (certain gene whose location is known)
