TABLE 5

Maximum-likelihood analysis of chromosome behavior in X/Y/Dp males using a model that excludes X and YDp sperm

Parameters for X/Y/Dp crossesProbabilities of sperm genotypes
XDpY and DpXY disjunctions only; Xand YDp sperm classes ignored
D = XDpY disjunction Embedded Image
1 – D″ = DpXY disjunction Embedded Image
Embedded Image Embedded Image
Embedded Image Dp = ½(1 – D″)
DEmbedded ImageEmbedded Image
Variation (7 d.f.) Correlation with D8.9 (0.26)143 (<10–10)74.3 (<10–10)
    Slope0.11–0.31– 0.05
    Significance (1 d.f.)5.6 (0.02)41 (2 × 10–10)0.7 (0.40)
    Sufficiency (6 d.f.)3.4 (0.76)102 (<10–10)73.7 (<10–10)

Maximum-likelihood analysis was done simultaneously using the X/Y/Dp and corresponding X/Y data. The parameters and sperm probabilities for the X/Y/Dp data are shown here and described in the text, while the parameters and sperm probabilities for the X/Y males were the same as those shown in Figure 1. Values for ln and parameter estimates were obtained for three classes of hypotheses: (H1) all parameters vary among crosses, (H2i) one parameter for the X/Y/Dp males is constant in all crosses, and (H3i) one parameter for the X/Y/Dp males is correlated to the disjunctional behavior of X/Y males (D). Values for G-test comparisons of these hypotheses are shown (along with the corresponding probabilities of getting this G value by chance alone).