Suppose that you are working with flies that are segregatingthree traits. You cross a homozygous truncated, vestigial, shavenfly with a homozygous wild-type, apterous, spineless fly and the F1flies are all wild-type, apterous, spineless. You next backcrossthe F1 flies to a truncated, shaven, vestigial parent. The progenyfrom this type of cross are shown below:
truncated apterous shaven 94
truncated vestigial shaven 425
truncated apterous spineless 46
truncated vestigial spineless 19
wild-type apterous shaven 16
wild-type vestigial shaven 46
wild-type apterous spineless 448
wild-type vestigial spineless 106
Total 1200
Draw a map and show the distances between the three genes.
