Upper plot: mass ratio vs. the distance from θ¹ Ori C with T Tauri types (CTTS and WTTS). Small symbols denote systems with separation <220 AU and large symbols separation >220 AU. Lower plot: mass ratio vs. binary separation with T Tauri types. Small symbols correspond to systems at a distance to θ¹ Ori C < 4 arcmin and large symbols a distance >4 arcmin. As in Fig. 13 open symbols denote ONC systems from D12. Mass ratios derived from S00 tracks are plotted.