When Mendel entered the Faculty of Philosophy, the Department of Natural History and Agriculture was headed by Johann Karl Nestler who conducted extensive research of hereditary traits of plants and animals, especially sheep.
Ketika Mendel masuk ke Fakultas Filsafat, Departemen Sejarah Alam dan Pertanian dipimpin oleh Johann Karl Nestler, yang melakukan penelitian ekstensif sifat turun-temurun dari tumbuhan dan hewan, terutama domba.