I want to point out that the thing that makes a minor key a minor key is that the distance from the first to the third step of the scale is a minor third rather than a major third. By this logic (which has prevailed for a good number of centuries) Miserlou, for instance, is *NOT* in a minor key.

Beyond that, thirty lashes with the proverbial wet noodle to Jason above for not knowing that C is the relative major to Am, and that as often as not, minor melodies tend to pass through the relative major--"Sunny Afternoon" (NOT "SUNDAY) AND "Moscow Nights" being examples.