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RHCh3 - Myers’ EXPL ORIN G PS YC HOLOGY(7th Ed Chapter 3...

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Myers’ EXPL ORIN G PS YC HOLOGY (7th Ed) Chapter 3 The Nature and Nurture Of Behavior James A. McCubbin, PhD Aneeq Ahmad, Ph.D. (modified by Ray Hawkins, Ph.D.) Worth Publishers
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Genes: Our Biological Blueprint To what extent are we shaped by our heredity ( nature ) and by our life history (of our nurture )? Chromosomes threadlike structures made of DNA that contain the genes DNA (deoxyribonucleic acid) complex molecule containing the genetic information that makes up the chromosomes has two strands-forming a “double helix”- held together by bonds between pairs of nucleotides
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Genes: Our Biological Blueprint Genes biochemical units of heredity that make up the chromosomes a segment of DNA capable of synthesizing a protein Each human is estimated to have about 30,000 genes. We are 99.9 similar in our DNA Human traits are influenced by gene complexes--- many genes acting in concert (e.g., intelligence)
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Genes: Their Location and Composition Nucleus Chromosome Gene Cell DNA
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Genetics: Mendelian Theory
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Evolutionary Psychology Natural Selection the principle that, among the range of inherited trait variations, those that lead to increase reproduction and survival will most likely be passed on to succeeding generations Mutation : a random error in gene replication that leads to genetic damage Of our .10% genetic differences, 6% are differences among races, 8% are differences within a race, and over 85% are individual variations within local groups. Why are we so much alike?
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Evolutionary Psychology Evolutionary Psychology the study of the evolution of behavior and the mind, using the principles of natural selection Example: breeding “friendly” foxes (Belyaev & Trutt) (Myers’ text, p. 74-75).
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