module 11-12

module 11-12 - Introduction to Psychology: Nature, Nurture,...

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Introduction to Psychology: Nature, Nurture, and Human Diversity Module 11: Behavior Genetics and Evolutionary Psychology Behavior Genetics: Predicting Individual Differences Behavior Geneticists: scientists who study our differences and weigh the relative  effects of heredity and environment Genes: biochemical units of heredity that make up the chromosomes Environment: every non-genetic influence, from prenatal nutrition to the people  and things around us Genes: Our Codes for Life Gene: segment of DNA containing the code for a particular protein; determines  our individual biological development Chromosome: threadlike structure made largely of DNA molecules DNA: a spiraling, complex molecule containing genes Genome
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Complete instructions for making an organism o Complex traits a combination of genes o Humans and animals Twin and Adoption Studies Allow us to control: o Heredity while varying the home environment o Home environment while varying heredity Types of studies: o Identical vs. fraternal twins o Separated twins o Comparing adoptive vs. biological relatives Identical vs. Fraternal Twins Identical twins: develop from a single fertilized egg, creating two genetically  identical organisms Fraternal twins: develop from separate fertilized eggs; genetically no closer than  other siblings Which are more similar? o Personality Identical twins more similar than fraternal on extraversion and  neuroticism o Divorce Identical twin who’s divorced: odds go up 5.5 times Fraternal twin who’s divorced: odds go up 1.6 times
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o BUT twins are often TREATED alike Separated Twins Striking similarities in personalities, attitudes, abilities, interests, and fears Criticisms: o Appearance affects treatment o Adopted twins place in similar environments o Strangers have similarities too Biological vs. Adoptive Relatives Are adopted children more like their adoptive parents or their biological ones? o
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This note was uploaded on 02/14/2011 for the course BIOL 1201 taught by Professor Wishtichusen during the Spring '07 term at LSU.

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module 11-12 - Introduction to Psychology: Nature, Nurture,...

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