No such experiment can ever be conducted. Any experiment can be claimed to have "unnatural advantage introduced by human intelligence" if it is designed by humans.
If you as a scientific thinker believe in an alternative to evolution, could you please provide some scientific evidence to support your view?
Bull, they are done everyday. Drop a rock and time it.
Evidence, sure, read Dr. James Shapiro. http://shapiro.bsd.uchicago.edu/21st_Cent_View_Evol.html