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Lecture 9

Psychology Lecture 9.docx

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Psychology 1000

Andreea Alexandra Gheorghita October 4, 2012 Genetics - Gene Action - Dominant and Recessive Traits - Polygenetic Effects Next time: Heritability (pg, 117 – 123) *For the midterm room NS 145* check OWL *Oct 4 – Oct 23 for psychology discussion online* Identical twins – genetically identical; see if they have similar behaviors, disorders - How do genes “work”? - What is the outcome with recessive genes? - How is more complex behavior coded? We would expect a one year old child to recover from traumatic brain damage more quickly than an adult? Why Young children have more synapses; increases plasticity. Split Brain - If you’re right handed, language is on the left side of the brain (80% of population) lateralization pattern - Left visual field  right hemisphere, right visual field  left hemisphere Genetics of Behavior Nature (something we are born with) versus Nurture (something we learn); both interact and are important to determine human behavior - Genes: strange like molecules of DNA, linked to chromosomes. o Karyotype: genetic blueprint o Humans have 23 pairs of chromosomes (22 autosomes, and sex chromosomes: XX and XY – Y chromosome is a lot shorter than the X chromosome) o DNA provides a template for RNA, which codes for protein molecules (sequence of amino acids) o The influence of genes is through protein synthesis.. there are no genes “for” a particular attribute o Genes “for” intelligence? Is it possible to have genetic influence for intelligence? Many people use reaction time as a measure of intelligence. Fas
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