Before revision: Another highly regarded figure in Drosophila research was Theodosius Dobzhansky, who invented the use of genetic markers and used them to study hybrid sterility between Drosophila pseudoobscura and Drosophila persimilis (
After revision: Another highly regarded figure in Drosophila research was Theodosius Dobzhansky, who invented the use of genetic markers and used them to study hybrid sterility between Drosophila pseudoobscura and Drosophila persimilis .