  We study the contribution of charginos and neutralinos of the Minimal SUSY
extension of the Standard model (MSSM) to the 1-loop vertices ZAA, ZZA, ZZZ,
and examine the related cancellation of anomalies. It is found that when the
SUSY parameter \mu satisfies |\mu| >> M,M', m_W, the couplings of charginos and
neutralinos with the gauge bosons become purely vectorial, and then their
contribution to the amplitudes for ZAA, ZZA and ZZZ vanish, which implies that
this sector of the MSSM does not generate a Wess-Zumino term. We evaluate also
the contribution of charginos and neutralinos to the \rho parameter, and find
that \rho=0 in the large-\mu limit.
