On Airbus planes, the side stick of both the captain and co-pilot are not synchronized in movement, meaning if you the captain moves the side stick, the co-pilot's side stick will not move together. If the co-pilot moves the side stick while the captain does, it will be a dual input.
However, on the Boeing 777 is also a fly-by-wire(FBW) design. But if you watch a 777 cockpit during flight, both of the captain and the co-pilot's yoke moves.
How is that done? Are both of the yokes connected by one mechanical system, and that mechanical system feeds the pilot input to the conputer? Or is it done electronically, with motors or other stuff?