The following tetrads were produced by a cross of aNeurospora strain that had white spores (w) and a nutritional requirement for the amino acid (arg) with a strain that had dark spores and no arginine requirement:
1
|
2
|
3
|
4
|
5
|
6
|
w arg
|
w arg
|
w arg
|
w arg
|
w +
|
w +
|
w arg
|
w +
|
+ arg
|
+ +
|
w +
|
+ +
|
+ +
|
+ arg
|
+ +
|
+ arg
|
+ arg
|
w arg
|
+ +
|
+ +
|
w +
|
w +
|
+ arg
|
+ arg
|
_____
|
_____
|
_____
|
_____
|
_____
|
_____
|
58
|
14
|
15
|
2
|
1
|
10
|
What is the map distance (in cM) between the arg locus and the centromere?