PSYCH 2AA3 Lecture 12: Lecture 12 - Behavioural Genetics
8 Aug 2016
School
Department
Course
Professor
Document Summary
Biology of heredity: 5ml of sperm containing 200-500 million sperm cells with only a few hundred reaching the finish line. One sperm penetrates and egg blocks off all the others: diploid somatic cells have 46 chromosomes, while haploid gametes have 23, finish later, genetic disorders. Huntington"s defective dominant allele on chromosome 4. Behavioural genetics is a branch of genetics that deals with inheritance of behavioural and psychological traits. Genes and environment work together and affect one another: ex. Babies are born with certain temperaments but this could change as time goes. Happens through parental discipline and other environmental factors: epigenetics. The way mother eats while pregnant could affect child"s obesity when older i. e. even prenatal environmental influences could alter genes. Genotype and phenotype: genotype set of genes inherited from conception, phenotype observable and measureable expression of genotype in interaction with environment, eg.
