Genetics - Genetics Human Genome Behavioral Genetics Family...

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Genetics § Human Genome § Behavioral Genetics § Family Studies § Twin Studies
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The Human Genome Genome refers to the complete set of genes that an organism possesses. Human genome contains 30,000–80,000 genes on 23 pairs of chromosomes. Human Genome Project is designed to sequence the entire human genome—i.e., identify the particular sequence of DNA molecules in human species. But identifying sequence of DNA molecules does not mean identifying the function of each molecule.
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The Human Genome Most genes in a human genome are the same for all humans. Small number of genes are different for different individuals, including genes that indirectly code for physical traits and for personality traits. Behavioral geneticists attempt to determine the degree to which individual differences in personality (for example) are caused by genetic and environmental differences. Highly controversial-
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Goals of Behavioral Genetics Determine the percentage of individual differences in a trait that can be attributed to genetic differences and percentage that can be attributed to environmental differences. Determine the ways in which genes and environment interact and correlate with each other to produce individual differences. Determine precisely where in the “environment” environmental effects exist—e.g., parental socialization, different teachers to which children are .
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Misconceptions About Heritability Heritability CANNOT be applied to single individual Heritability is NOT constant or immutable Heritability is NOT a precise statistic
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Nature-Nurture Debate Clarified No such debate at the individual level.
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