Dr. Nation is a biological psychologist interested in studying genetic influences on intelligence. Briefly describe a study Dr. Nation might design to investigate the research question: "How do genetics and environmental influences interact to impact our intelligence?" Use the following terms context in your description: • Heritability • Epigenetics • Fraternal or identical twins •fMRI
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By comparing the similarity of IQ scores between fraternal and identical twins, the researcher could calculate a heritability score, which would indicate the amount of variation in intelligence between individuals in a population that could be explained by genetics. If the researcher found that environment has a large impact on variation in intelligence, they could investigate whether some of this variation could be explained by epigenetic effects by studying markers on sections of the genome associated with intelligence. Another way of approaching the research question would be to put sets of identical and fraternal twins through intelligence tests while performing fMRI scans on them. If brain scans showed more similar brain activity between identical than fraternal twins, this would indicate strong genetic effects on intelligence.
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Dr. Nation is a biopsychologist interested in studying genetic influences on brain development. Briefly describe a twin study Dr. Nation might design to investigate the research question: “How do genetics and early environmental influences interact to impact how brains develop?” Use the following terms in context in your description: Genes, Heritability, Epigenetics, Fraternal or identical twins, fMRI.