Bizarre parasite that kills male insects and disrupts insect sex lives is not all bad: it can make sterile fruit flies fertile again
http://www.berkeley.edu/news/media/releases/2002/07/03_paras.html

Robert Sanders, Media Relations

Researchers at UC Berkely discover that the bacterium Wolbachia pipientis allows a sterile female fruit fly to lay eggs, circumventing a genetic mutation in a gene that is the key to determining the sex of offspring, reports this campus news article. The article introduces the sex-lethal gene, Sxl, and offers a discussion of sex determination in Drosophila.

This resource is referenced here:

• Microbial Life:Resources for K-12 Teachers and Students:The Microbes Within: Resources
• Microbial Life:Topics of Interest:Wolbachia: Wolbachia Resources

Subject: Biology, :Microbiology, Molecular Biology, Ecology:Symbiotic Relations, Biology:Evolution
Resource Type: Scientific Resources:Overview/Reference Work
Grade Level: General Public, College Lower (13-14), High School (9-12)