  I will present a simple, economic and predictive model of Yukawa structures
in the context of a renormalizable SO(10) grandunification. The righthanded
neutrino mass is generated radiatively. The fermions have Yukawa couplings with
one 10 and one 120 dimensional Higgses. In the approxiamate two generation
scenario the model predicts degenerate neutrinos, small quark mixing and b-tau
Yukawa unification.
