  The effect of one-gluon-exchange (OGE) pair-currents on the ratio $\mu_p
G_E^p/G_M^p$ for the proton is investigated within a nonrelativistic
constituent quark model (CQM) starting from $SU(6) \times O(3)$ nucleon wave
functions, but with relativistic corrections. We found that the OGE
pair-currents are important to reproduce well the ratio $\mu_p G_E^p/G_M^p$.
With the assumption that the OGE pair-currents are the driving mechanism for
the violation of the scaling law we give a prediction for the ratio $\mu_n
G_E^n/G_M^n$ of the neutron.
