In breeding experiments between 1856 and 1865, Gregor Mendel first traced inheritance patterns of certain traits in pea plants and showed that they obeyed simple statistical rules with some traits being dominant and others being recessive. These patterns of Mendelian inheritance demonstrated that application of statistics to inheritance could be highly useful; they also contradicted 19th century theories of blending inheritance as the traits remained discrete through multiple generation of hybridization.
who carried out the first genetic study in history
Gregor Mendel