  The formation and evolution of a low mass galaxy in the gravitational field
of a massive disk galaxy (like the Milky Way) has been studied. Numerical
simulations of complex gas-dynamic flows are based on our own variant of the
Chemo-Dynamical Smoothed Particle Hydrodynamical ({\bf CD-SPH}) approach, which
incorporates star formation. The dynamics of the dark matter was treated as a
standard N-body problem. It is shown that the satellite galaxy effectively
looses its dark matter component due to the strong tidal influence of the
massive galaxy, while the gas, owing to its strong dissipative nature, forms an
almost dark-matter-free dwarf galaxy.
