11 books
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8 voters
Epigenetics
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In every human being genomes tell the story of our evolution, written in the language of DNA. The narrative is unmistakable and ever changing.
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Ants have a powerful caste system. A colony typically contains ants that carry out radically different roles and have markedly different body structures and behaviors. These roles, Reinberg learned, are often determined not by genes but by signals from the physical and social environment. 'Sibling ants, in their larval stage, become segregated into the different types based on environmental signals,' he said. 'Their genomes are nearly identical, but the way the genes are used—turned on or off, a
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