PSYC 304 Lecture Notes - Lecture 2: Prenatal Development, Apgar Score, Fallopian Tube
Document Summary
Genes affect every aspect of biology and behavior. Genotype- genetic make-up; not always expressed: set at conception and endures through life. Genes never act alone; always interact with the environment: nature-nurture interaction. Experience: eating too much, unhealthy foods, not enough exercise. Societal reactions to body size/personal feelings about weight. Personality traits: quick temper, sensation seeking, high anxiety. People drink in environments with alcohol; people with friends and family who drink, are also known to drink. Our own genes influence the environments we are in. Niche-picking: humans choose and create our own environments, influenced by our genes. Our environments influence which genes are expressed: epigenetics biochemical modifications of the dna influencing gene expression, without altering the structural base-pair sequence itself. Schizophrenia: lifetime risk in general population 1, sibling (non-twin) has it 9, dizygotic twin (fraternal) 17, monozygotic twin (identical) 48, this suggests that the genes are being influenced by the environment.
