Can you play Wii games on Gamecubes?

I was just wondering because I went to the store when Wii games first came out and bought a Wii game hoping to play it on my Gamecube because I heard that you could play Gamecube games on Wiis, so I assumed. One friend told me it is possible, while the other one told me you can't play them on Gamecubes.... show more I was just wondering because I went to the store when Wii games first came out and bought a Wii game hoping to play it on my Gamecube because I heard that you could play Gamecube games on Wiis, so I assumed. One friend told me it is possible, while the other one told me you can't play them on Gamecubes. I've never seen a Wii game disk before so I don't know. Please, help me out! Thanks!
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