Trofim Lysenko was Stalin’s favorite scientist because he liked his meshing of evolution and Marxism. Comrade Lysenko “proved” that there is no such thing as a gene. A lot of money was dumped into the “research” of this crackpot, and woe to those who declared that the emperor had no clothes.
Lysenko’s gene-free view of science led to claims that wheat plants could produce rye. Any disagreement was labeled as “political