  In this letter we present a simple scenario where the mass scales associated
to atmospheric and solar neutrino oscillations are obtained through the
dynamical generation of neutrino masses. The main idea is that the two
different scales are the result of two independent mechanisms, namely a type-I
seesaw generating the atmospheric scale and a radiative 1-loop process
providing the solar one. A relation of the two scales, reminiscent of the
so-called sequential dominance, is thus obtained.
