http://news.yahoo.com/s/nm/20050606...iYSH9EA;_ylu=X3oDMTBiMW04NW9mBHNlYwMlJVRPUCUl
Altering a single gene in a fruit fly can turn its sexual orientation around, causing male flies to lose interest in females, and females to display male mating rituals to other females, according to a study published in the journal Cell on Friday.