Could the newly discovered aggression genes in fruit fly be responsible for the antics of Hollywood's Baddest Bad Boy? U.S. geneticists from North Carolina State University say that the genes identified in the Drosophila melanogaster may contribute to abnormal aggression in celebrities, plain humans and other animals.

In their experiment, scientists tormented fruit flies by making them fight for their food. After 28 generations, two distinct groups emerged. The high aggression group, call them the Crowe gang, were noted for more kicking, chasing and boxing. On the other hand, a Ghandi-esque, low aggression group displayed the same reaction as the 90-lb weakling who got sand kicked on his face - hardly a peep.

The researchers said that the environment remains more important than the genes, but found the effect of the aggression gene very interesting.

The genus Drosophila includes fruit flies, vinegar flies, wine flies, pomace flies, grape flies, and picked fruit-flies. But Drosophila melanogaster, the fruit fly, is the one that plays a very important role in genetic studies focusing on development, physiology, ecology, and behaviour, among others.