PSYC1003 Lecture Notes - Lecture 9: Quantitative Trait Locus, Chromosome Abnormality, Behavioural Genetics
Document Summary
Physical and cognitive development chapter 12 & 13. There is a variation in the human population: physical variation: hair/eye colour, height, baldness, cognitive variation: iq, language, memory, behavioural variation: personality. Psychology interfaces with genetics: genotype + environment = phenotype. On each chromosome there are set of genes, which for organism functions either in isolation or through interaction with other genes. Some instances of inheritance are complex: polygenic inheritance genetic disorders. 7000 known genetic disorders that have a range of causes and outcomes. Disorders caused by dominant genes: one copy of gene suf cient. Chromosomal abnormalities: errors found during gamete formation resulting in genetic abnormalities, down"s syndrome (trisomy 21) - low iq, memory and speech problems, etc. Polygenic inheritance: variables of interest to developmental psychologists are not typically determined by singular genetic abnormalities, instead, the kinds of psychological processes typically studied implicate complex interactions between sets of genes - polygenic inheritance.
