In November 1942, Otmar von Verschuer succeeded Eugen Fischer as Director of the Kaiser Wilhelm Institute of Anthropology, Human Genetics, and Eugenics. von Verschuer had been the Director of the Institute of Hereditary Biology and Race Biology at the University of Frankfurt, where he had become famous for his studies of genetic vs. environmental influences in twins. His assistant at the University of Frankfurt was Josef Mengele. (DNAi location: Chronicle > In the Third Reich > Applying the solution)

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