Complementation problems                                                                            >> Notes

State the number of complementation groups (different gene loci) in each set of crosses, and which strains contain defective alleles for  the same locus.  (-) means failure to complement; (+) means complementation, restoration of function.

1. A.

 
1
2
3
4
5
6
1
-
+
-
+
+
+
2
+
-
+
-
-
-
3
-
+
-
+
+
+
4
+
-
+
-
-
-
5
+
-
+
-
-
-
6
+
-
+
-
-
-

1. B.
 

 
1
2
3
4
5
6
7
1
-
+
+
+
-
+
-
2
+
-
+
+
+
+
+
3
+
+
-
-
+
-
+
4
+
+
-
-
+
-
+
5
-
+
+
+
-
+
-
6
+
+
-
-
+
-
+
7
-
+
+
+
-
+
-