German biologist and eugenicist Otmar Freiherr von Verschuer was an advocate of racial hygiene and the mandatory sterilization of the physically and mentally disabled. He also led the Nazi experiments on twins based on body parts made available to him from the inmates of various concentration camps.
German botanist and geneticist Carl Correns is remembered for re-working on rediscovered Gregor Mendel’s paper on the principles of heredity. He was a student of renowned Swedish botanist Karl Nägeli. Initially a botany instructor at the University of Tübingen, he later became the first director at the Berlin-based Kaiser Wilhelm Institute for Biology.
Rudolf Jaenisch is a German Professor of Biology currently working at the Massachusetts Institute of Technology, USA. He is also one of the founding members of the prestigious Whitehead Institute for Biomedical Research, which aims at improving human health through biomedical research. A pioneer of transgenic science, Jaenisch has been creating genetically engineered mice to study neurological diseases and cancer.