How did the work of th morgan and company contribute to the eventual discovery that dna was the genetic material in the cell?

Thomas Hunt Morgan received a Nobel Prize in Medicine in 1933 for his theory on the chromosomal theory of inheritance. Using Drosophila melanogaster (fruit flies), he and his students were able to perform ground-breaking genetic research. They narrowed the search for genetic materials to either DNA or proteins and eventually proved that the genes are actually located in chromosomes.  

The bags should be yellow i believe