  We investigate the influence of primordial perturbations of the energy
density and space--time metric on the generation of the lepton and baryon
asymmetries. In the weak and strong washout regimes baryon isocurvature
perturbations with amplitudes of the same order as those of the CMB
perturbations are generated on scales of order of the respective Hubble scale.
They are, however, completely washed out by baryon and photon diffusion at the
later stages of the universe's evolution.
