In mice, the following alleles were used in a cross: W = waltzing gait w = nonwaltzing gait G = normal gray color g = albino B = bent tail b = straight tail In a three-point testcross, a waltzing, gray, bent-tailed mouse heterozygous for all three genes is crossed to a nonwaltzing, albino, straight-tailed mouse, and the following progeny obtained:

waltzing gray bent 48

waltzing albino bent 63

nonwaltzing gray straight 57

nonwaltzing albino straight 66

waltzing gray straight 12

waltzing albino straight 15

nonwaltzing gray bent 15

nonwaltzing albino bent 18

a. Use Chi-square analyses to determine which of the three genes show evidence of linkage.

b. For any genes that show linkage, calculate their genetic distance.