Ghosts in the Genome

How one generation’s experience can affect the next

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© ROBERT BROOK/SCIENCE PHOTO LIBRARY/CORBIS

In one of the 20th century’s most disastrous collisions of political ideology and science, the Russian botanist Trofim Lysenko steered the USSR’s agricultural research policies to deemphasize the deterministic concepts of Mendelian inheritance. Instead, Lysenko was committed to the idea that, within the space of a single generation, the environment could alter the phenotype of future generations, an idea that is now often (imprecisely) referred to as “Lamarckian” inheritance. In Lysenko’s view, Mendelian inheritance, along with Darwinian evolution, emphasizes competition, whereas he believed that biology was based on cooperation, and that hard work in one generation should rapidly lead to the betterment of the species.

Lysenko was among the most infamous purveyors of the idea that the environment experienced by an organism could influence the ...

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