 McClintock received a fellowship from the Guggenheim Foundation that made possible six months of training in Germany during 1933 and 1934 . She had planned to work with Curt Stern , who had demonstrated crossing @-@ over in Drosophila just weeks after McClintock and Creighton had done so ; however , Stern emigrated to the United States . Instead , she worked with geneticist Richard B. Goldschmidt , who was the head of the Kaiser Wilhelm Institute . She left Germany early amidst mounting political tension in Europe , and returned to Cornell , remaining there until 1936 , when she accepted an Assistant Professorship offered to her by Lewis Stadler in the Department of Botany at the University of Missouri @-@ Columbia . While still at Cornell , she was supported by a two @-@ year Rockefeller Foundation grant obtained for her through Emerson 's efforts . 
