101183 Lecture Notes - Lecture 5: Phenotypic Trait, Behavioural Genetics, Twin Study

• School: UWS
• Department: University of Western Sydney
• Course: 101183
• Professor: Kell Tremayne

Document Summary

Lecture outline: basic genetics, behavioural genetics: explaining individual differences, twin studies/ adoption studies, hereditability. Intelligence: the effect of environment on genes, personality, the effect of genes on the environment. Biologically based style of reacting to the environment. Genes: human body has about 25,000 genes, genotype: the specific genetic makeup of the individual, phenotype: the individuals observable characteristics, different forms of the same gene are called alleles, difficult to infer genotypes from observing phenotypes. Can certain genes explain differences in behaviour: example of drosophila and aggression, polygenic transmission is when a number of gene pairs combine their influence to create a. Is there an aggression gene in drosophila? singly phenotypic trait: these genes then interact with the environment which then turns on or off the genes. Identical twins have a concordance rate of about 67% for experiencing clinical depression, compared with only 15% for fraternal twins (gershon et al. , 1989). If ac = bp and ac =/ ap.