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Weapon X: Biographical Information On Known Mutants
Bio: On the day he was born, Jamie Madrox created an exact duplicate of himself when the doctor slapped him on the rear. Weeks later, at Professor X's urging, Jamie's father moved the family to an isolated farm.

Jamie was given a special suit that neutralized his ability. In time, Professor X invited Jamie to join the X-Men. Jamie declined, opting instead to follow other dreams, which landed him in the United States mutant containment facility.

Jamie was illegally released from containment by Eric Lensherr aka Magneto and briefly joined his Brotherhood of mutants. His current where-abouts are unknown.