Next time you do your preflight check, notice how the up going aileron goes higher than the downward one - this is to increase drag on the wing going down which in turn reduces adverse yaw.
That's called differential aileron, however it's not vastly effective. You might also notice that on some a/c the hinge point of the aileron is below and to the rear of where it joins on to the wing. The effect is to allow the leading edge of the upgoing aileron to tilt down so it sticks out into the airflow to increase drag on that side and counteract the adverse yaw.