  We analyse the fermion masses and mixings in the flipped SU(5) model. The
fermion mass matrices are evolved from the GUT scale down to $m_W$ by solving
the renormalization group equations for the Yukawa couplings. The constraints
imposed by the charged fermion data are then utilised to make predictions about
the neutrino properties . It is found that the {\it generalized } see-saw
mechanism which occurs naturally in this model can provide {\it i})a solution
to the solar neutrino problem via the MSW mechanism and {\it ii})a sufficiently
large $\nu _{\tau }$ mass to contribute as a hot dark matter component as
indicated by the recent COBE data.
