Polycrystalline, Dy0.5Gd4.5Si2Ge2 compound (monoclinic, space group P-21/a) has been synthesized and characterized. This compound orders ferromagnetically at similar to 210K (TC) followed by an antiferromagnetic-like transition at similar to 21 K (TN). The electrical resistivity, p, follows T-2 law in the ferromagnetically ordered state indicating the presence of dominant single magnon scattering. There is a pronounced increase of resistivity in the vicinity of antiferromagnetic transition. Thermoelectric power, S, indicates a slope change near T-C and has T-3 dependence at low temperatures. (c) 2005 Elsevier B.V. All rights reserved.