TABLE 3.

Mutational parameters for second chromosome viability estimated by different methods

Estimation method	λII	E(s)
BM order method	0.006	0.290
BM using control C2	0.065	0.057
MD control supported	0.111	0.034
MD control determined	0.098	0.039
ML	0.036	0.092

Estimates of the rate λ_II and average effect E(s) of second chromosome viability mutations obtained by different methods (BM, Bateman–Mukai; MD, minimum distance; ML, maximum likelihood; see text for further explanation).