If you're talking about the original version, no, you can't transform. But if you have the
expansions, do the main quest and rumor has it, you become one immune to disease or not.

sorry, messed up. Do the sosliem (Spelled wrong) main quest and you become one.

on the game of the year you geat a ring on solithom (spelled wrong) when you do the
mission for the skoul and you kill their leader

sorry, but you cant be a werewolf on xbox morrowind.