Complex sentence: George Harrison Shull (April 15,1874-September 28,1954) was an American geneticist, he described heterosis in hybrid maize in 1908 and made a number of other key discoveries in emerging field of genetics.
Split into simpler sentences: George Harrison Shull (April 15,1874-September 28,1954) was an American geneticist. He described heterosis in hybrid maize in 1908 and made a number of other key discoveries in emerging field of genetics.