fyi mendel was ‘rediscovered’ and there was a bit of difficulty in having mendelian inheritance work with darwinian natural selection / adaptationism.
can look up the ‘modern synthesis’ to learn a bit about it. a marxist who talks about it with a specialty in biology is richaed c lewontin. he has a massey lecture called ‘biology as ideology: the doctrine of dna’ and you can listen to it on youtube or read the associated publication which is a short book that is a essentially a transcription.
no biology background needed.