Textbook Notes (363,314)
Canada (158,331)
Psychology (900)
PSYC 100 (164)
Chapter 3

Chapter 3

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Simon Fraser University
PSYC 100
Russell Day

PSYC 100 EVOLUTION, GENES AND BRAIN 3 Influences from the Past Biologically based mechanisms: Preprogrammed function and behavior in us Evolution: Change over time where particular genes occur within an interbreeding population Natural Selection: Characteristics which increase the likelihood of survival over time become more common in species Adaption: Products of natural selection Evolutionary Noise: Variations which neither hurt nor help humans Remote Causes (distant past causes) and Proximate Causes (recent causes) both influence the human behaviour Genetics Genotype: Specific genetic makeup of the individual Phenotype: Individuals observable characteristics Chromosome: Double-stranded, tightly coiled molecule of deoxyribonucleic acid Adenine, thymine, guanine, cytosine Normally 46, sex cell has 23 Zygote: Union of a sperm and an egg Genes: Biological units of heredity Average gene has about 3000 ATGC Only dominant genes show through, over recessive genes Polygenic Transmission: Number of gene pairs combine their influences to create a single phenotypic trait Behavior Genetics: Study of how heredity and environment interact to influence psychological characteristics Cocordance: The similar occurrence of genes (may suggest some relationship) www.notesolution.com
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