  In a SUSY GUT model responsible for generating symmetric quark mass matrices
at the GUT scale (mu = Lamda) we assume that the top-Yukawa coupling, lamda_t,
becomes infinite at that scale. As a consequence, the MSSM renormalization
group equations for quark Yukawa couplings exhibit hierarchical solutions which
lead to a pattern of texture zeroes in quark mass matrices at mu = Lamda
similar to one of the solutions of Ramond, Roberts, and Ross. The evolution in
energy scale to low energies shows excellent agreement between the measured
quantities involving the scale-independent ratios of CKM matrix elements and
their predicted values in terms of quark mass ratios. It is noted that the
tt-bar condensate model of Bardeen, et al. predicts an infinite lamda_t at mu =
Lamda implying, for our model, that at mu = Lamda, both the symmetry of Yukawa
matrices and condensate dynamics may have a common origin.
