PSYC 100 Chapter Notes -Gene Knockout, Guanine, Extraversion And Introversion

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Dr.Ada Mullett

Document Summary

Behaviour arises from two origins: being born with it (nativism/nature) or experience (empiricism/nurture) Behaviour genetics: study of genetic influences on behaviour. Chromosomes: threadlike structure in the nuclei of living cells; contains genes. Humans have 22 autosomes and one xy (male) or xx (female) sex chromosome. Chromatid: one of two identical halves of a replicated chromosomes. Genes: small units of dna that direct the synthesis of proteins and enzymes and result in the expression of inheritable traits. Homozygous: each parent contributes the same allele for a particular gene (opposite is heterozygous) Alleles: alternative forms of the same gene (pair of genes, one from mom, one from dad) Dominant: trait that is exhibited when an individual possess heterozygous alleles at the locus (human eyes) Recessive: trait that occurs when it is expressed by homozygous alleles (blue eyes) Genes don"t directly influence behaviour, but they guide cells to generate proteins that cause our cells to form chemicals related to behaviour (neurotransmitters)