Drosophila melanogaster testis and sperm

Drosophila melanogaster is a fly, distributed world wide with the exception of extremes of altitude or latitude.  Its claim to fame is that, for the last 100 years or so, it has been a favourite organism for biological research, initially in the field of genetics, but latter for the investigation of fundamental problems in biology from the fields of ecology to neurobiology. 

Today, there are about 7,500 researchers devoted to the study of fundamental problems in biology working with Drosophila. Many advances in our understanding of human development and human disease have come from this work, a fact recognised by the award in 1995 of the Nobel Prize for Physiology or Medicine to three Drosophila workers, Ed Lewis, Eric Weischaus and Christiane Nüsslein-Volhard.

Credit: Earl Nishiguchi