Complex sentence: There they produced results from experiments with Drosophila eye transplants which became integral to the work of Beadle and Tatum, who were working with Neurospora, and from this research developed the'one gene, one enzyme' hypothesis.
Split into simpler sentences: There they produced results from experiments with Drosophila eye transplants. This became integral to the work of Beadle and Tatum, who were working with Neurospora, and from this research developed the'one gene, one enzyme' hypothesis.