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The Study of Genetics

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             Mendel started     Walter Fleming   Herman Mullern  Arthur Kornberg    First
             experimenting         discovered       makes mutant     makes DNA in a   cloned
             with pea plants      chromosomes            flies                    test tube         animal
                    1857                           1882                       1919                        1957               1997?
     1655                 1865                        1902                        1944                      1968
Cells were       Mendel               Walter Sutton     Oswald Avery        Scientists
discovered   announced           demonstrates   announces that   begin to make    
 by Robert     'Mendel's        that chromosomes      DNA is             a human clone
   Hooke             Laws'                 exist in pairs     responsible for