Lod Score     Marker Position 0 0.1 0.2 0.3 0.4 Zmax θmax DXS1214 33.54cM -9.54 -0.07 0.36 0.41 0.27 0.41 0.3 DXS993 42.50M -7.51 0.26 0.62 0.57 0.31 0.62 0.2 DXS1001 75.79cM 2.40 2.03 1.62 1.16 0.63 2.40 0 DXS1047 82.07cM 1.50 1.27 1.01 0.72 0.39 1.50 0

Table 1: Two-point LOD score with polymorphic DNA markers on chromosome Xp11.4-p11.3 and Xq26-q27.