Mass ratio distribution for the ONC binaries of our extended sample in comparison with the distribution derived for wide binaries in Tau-Aur and Oph with primary mass range 0.15 to 0.8 M_⊙ using the B98, PS99, and S00 PMS tracks for systems with separations from 85 to 560 AU. Also shown are the best-fit power-laws dN/dq ∝ q^Γ to the mass ratio distributions in ONC and Tau-Aur. The Tau-Aur distribution is offset along the x-axis for the purpose of clarity.