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In a SUSY GUT model responsible for generating symmetric quark mass matricesat the GUT scale (mu = Lamda) we assume that the top-Yukawa coupling, lamda_t,becomes infinite at that scale. As a consequence, the MSSM renormalizationgroup equations for quark Yukawa couplings exhibit hierarchical solutions whichlead to a pattern of texture zeroes in quark mass matrices at mu = Lamdasimilar to one of the solutions of Ramond, Roberts, and Ross. The evolution inenergy scale to low energies shows excellent agreement between the measuredquantities involving the scale-independent ratios of CKM matrix elements andtheir predicted values in terms of quark mass ratios. It is noted that thett-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 Yukawamatrices and condensate dynamics may have a common origin.Comment: 29 pages, added PS version, fixed PS fil

Pattern of texture zeros in quark mass matrices with a divergent top-Yukawa coupling at the GUT scale