The biological approach
- Created by: Chloe Rugman
- Created on: 19-04-18 17:57
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- The Biological Approach
- influence of genes
- genes are part of chromosomes of an organism that carry info in form of DNA (23 pairs = 46 chromosomes) determines physical/ psychological characteristics
- genetic basis
- twin studies to determine genetic basis of traits (concordance rates of MZ/DZ twins)
- MZ twins suggested variation in individual intelligence could be 60-80% due to genes
- twin studies to determine genetic basis of traits (concordance rates of MZ/DZ twins)
- biological structures
- brain/nervous system thought to be responsible for behaviours i.e. frontal lobe
- neurochemistry
- chemical/ neural processes associated w/ nervous system
- levels of neurotransmitters in brain can affect behaviour
- excitatory: trigger the neuron to send an impulse (dopamine)
- inhibitory: inhibit nerve impulses to calm brain/stable mood (serotonin)
- evolution
- Charles Darwin overtime adapting to environment through biological evolution (trait increasing survival passed on - survival of the fittest)
- natural selection - traits increase reproductive success & passed to next generation/ trait more widespread
- strengths: scientific methods/ objective measures i.e. brain scanning; real world application treatment of depression w/ drugs
- weaknesses:twins/ family members exposed to same environment (nature/nurture debate);
- phenotype = way genes are expressed
- genotype = genetic makeup (cannot be determined from observing phenotype)
- influence of genes
- phenotype = way genes are expressed
- genotype = genetic makeup (cannot be determined from observing phenotype)
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