Genetics was declared a pseudoscience in USSR. Most geneticists were imprisoned, executed or put “under the cap”. It was a thought crime to even mention it. Only after several decades this denialism started to decline and research was finally allowed.
All of this is well known fact, but very few people actually ask question “why?”. Soviets were obsessed with “science”. Everything was about “science”. Total number of academics in USSR was ginormous. Why would they do such a nonsensical thing?
Foundation of Marxist theory in biology was Darwin theory of evolution. The main idea was that everything was defined by environment and natural selection process. Strict interpretation of mendelian inheritance would make Darwin evolution theory somewhat contradictory. As a result, the soviets rejected Mendelian genetics.
Trofim Lysenko was trying to develop new crops using vernalization process. In simple layman terms it was just a process of exposing crop to cold temperatures and applying accelerated natural selection process to achieve desired result. Lysenko has been defamed and demonized, but similar approach in biology was practiced by many others with some success.
After several decades genetics was legalized in biology. Some limited research in medicine were also allowed. Interpretation were strictly curated for ideological consistency.
Nevertheless genetics in social sciences or social psychology remains taboo even today. All modern marxist “scientists” reject an idea that humans can make different choices in life because they have different genetics. Every human decision is because of the environment and have nothing to do with biology or genetics.
Modern marxist academicians have the same ideas as soviet ones….but they are just more insane and ignorant.