PSYC 202 Lecture Notes - Chromosome, Twin, Posttraumatic Stress Disorder
15 Jan 2013
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Document Summary
Any measure of intelligence is best viewed as an index of the phenotype. Its critical to recognize that various clinical syndromes are disorders of the phenotype not of the genotype. Only the genotypes for these disorders can be inherited. Whether the genotype will eventually will come out in the phenotypic beh disorder depends on environment and experience. A predisposition also known as a diathesis may be inherited but not the disorder itself. The study of genetics has relied on 4 basic methods to uncover whether a predisposition for psychopathology is inherited: comparison of members of a family, comparison of pairs of twins, the investigation of adoptees, and linkage analysis. The family method can be used to study a genetic predisposition among members of a family cuz the average # of genes shared by two blood relative is known. Parents and kids are identical in 50% of their genetic background.
