A series of two-point crosses were carried out among seven loci (a, b, c, d, e, f, and g), producing the following recombination frequencies. Map the seven loci, showing their linkage groups, the order of the loci in each linkage group, and distances between the loci of each linkage group.

Loci % Recombination Loci % Recombination

a - b 50 c - d 50

a - c 50 c - e 26

a - d 12 c - f 50

a - e 50 c - g 50

a - f 50 d - e 50

a - g 4 d - f 50

b - c 10 d - g 8

b - d 50 e - f 50

b - e 18 e - g 50

b - f 50 f - g 50

b - g 50