Psychology - Module 6: Nature, Nurture, and Human Diversity...

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Module 6: Nature, Nurture, and Human Diversity Behavior Genetics and Evolutionary Psychology Behavior Genetics: Predicting Individual Differences Genes: Our Codes for Life Gene DNA Chromosome DNA     : a molecule containing the genetic information that makes the chromosomes. Genes:      Segments of DNA containing the code for a particular protein; determines our  biological development. Chromosome     : made of DNA molecules. Genome     :  the complete instructions for making an organism. Human traits are influenced by gene complexes—many genes acting in concert. Twin Studies Identical vs. Fraternal Twins Identical  twins: developed from one fertilized egg. Same DNA. Fraternal  twins: developed from separate fertilized eggs. Genetically no closer than  brothers and sisters. Can be same or opposite sex. Identical twins share more similar traits than fraternal twins—supports that heredity has  importance in the development of the trait. Adoption Studies Adopted children tend to resemble their biological parents in their  personality , and their  adoptive parents in their values, attitudes, manners, faith, and politics. Temperament Studies Temperament , a person’s characteristic level of emotional reactivity and intensity, is apparent  soon after birth and tends to continue into adulthood. Suggests that heredity plays larger role  than environment in the development of temperament. Heritability The proportion of variation among individuals that we can attribute to genes. The   heritability   of   a   trait   may   vary,   depending   on   the   range   of   populations   and  environments studied.  Group Differences:   Heritable  individual  differences need not imply heritable  group  differences. Nature and Nurture Genes are self-regulating : not blueprints; react differently in different environments.
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Gene-Environment Interaction Psychological traits are a product of the interactions of our genetic predispositions and our  surrounding environment.  The New Frontier: Molecular Genetics Knowing which genes result in disorders can lead to detection of babies of such risks.  However, ethical dilemmas are involved in “selecting” the babies. Evolutionary Psychology: Understanding Human Nature Evolutionary psychologists:  understand how natural selection has shaped behaviors found  throughout the human species. Natural Selection Belyaev and Trut show that through natural selection foxes can be domesticated. An Evolutionary Explanation of Human Sexuality
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This note was uploaded on 04/09/2009 for the course PSYCH 101 taught by Professor Maas, j during the Spring '08 term at Cornell University (Engineering School).

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Psychology - Module 6: Nature, Nurture, and Human Diversity...

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