tbh though, the guppies wont be around long enough and the aquarium wont be big enough to display the behavior you're trying to exhibit anyways. you may be able to display that preditors go for more colorful prey. but i dont think that by the female choosing the lesser colored males shows anything other than the females have to spawn with the lesser colored males because they're all that's left. not to crush your dreams but from one aspiring scientist to another your experiment will not display the idea you're trying to convey.
i think a simply breeding project would be a better idea. i also think Africans is the way to go.
or a tank with a c.regani, a sa leaf fish and some live bearers. that'll really display a good food chain. the live bearers wont over populate because of the leaf fish and the pike, but they will reproduce because both predators are more ambush and not open water predators.
in reference to chaz88 comment, youre better off majoring in mathematics or physics than business... its hard enough for a bachelors in business to shine, let alone a minor in it.
planned on a minor in Physics or physical science with my Major in Biology. Really to minor in business would be a waste of time, Id be taking extra classes away from my normal ones and with a minor how much could I even do in the business field? take calls in a cubicle or sell life insurance? Sounds like a career in hell to me.
Honestly guys, I could have hundreds of hypothetical aquariums by the end of the night if I wanted... Its just kinda cool to think about is all.