Fruit fly experiments produce only fruit flies (Talk.Origins)

Claim CB910.1:

Fruit flies have been mutated and bred in laboratories for generations, but they are still fruit flies.

Source:
 * Watchtower Bible and Tract Society, 1985. Life--How Did It Get Here? Brooklyn, NY, 104.

CreationWiki response:

This is nothing short of proof that the claim is 100% correct

Translation General Evolution Theory is unobservable and untestable.

That puts it in the realm of faith not science.

Experimentos com moscas das frutas produziram apenas moscas das frutas (Talk.Origins)