  We present a measurement of the mass dependence of the forward-backward
charge asymmetry (A_{FB}) for electron-positron pairs produced via an
intermediate Z/gamma with mass Mee > 40 GeV/c**(2). We study the constraints on
the Z-quark couplings imposed by our measurement. We analyze an integrated
luminosity of 72 pb-1 collected by the CDF II detector in proton anti-proton
collisions at s**(1/2) = 1.96 TeV at the Fermilab Tevatron. A comparison of the
uncorrected A_{FB} between data and Standard Model Monte Carlo gives good
agreement with a chi^2/DOF of 15.7/15. The couplings measurements are also
consistent with Standard Model predictions.
