New genes linked to brain size, intelligence - 2 views
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genes that increase your risk for a single disease that your children can inherit
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factors that cause tissue atrophy and reduce brain size, which is a biological marker for hereditary disorders
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sample large enough to reveal clear patterns in genetic variation and show how these changes physically alter the brain
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unearth new genetic variants in people who have bigger brains as well as differences in regions critical to learning and memory
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screened the genomes of people suffering from a specific brain disease and combed their DNA to uncover a common variant.
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variations in their DNA that help boost or lower their brains’ susceptibility to a vast range of diseases
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People also can take preventive steps through exercise, diet and mental stimulation to erase the effects of a bad gene
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People whose HMGA2 gene held a letter “C” instead of “T” on that location of the gene possessed larger brains and scored more highly on standardized IQ tests
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