2. Three genes with recessive mutant phenotypes are located on
the same chromosome in maize: fine strip (f), bronze aleurone (bz),
and knotted leaf (kn). A plant with all three mutant phenotypes is
crossed with a true-breeding, wild-type plant. Resulting F1 plants
are then backcrossed to the parental mutant line to produce the
following progeny:

Fine       
Bronze     Knotted    
    Number
f                      
+         
   kn    
        1261
+                     
bz        
   +      
        1192
f                      
bz        
   kn    
        755
+                     
+         
   +      
        762
+                     
+         
   kn    
        101
f                      
bz        
   +      
        126
f                      
+         
   +      
        392
+                     
bz        
   kn    
        407
           

           
A.   How many non-recombinant progeny were
identified?
           
B.   How many of the F2 plants contained a crossover
between the fine strip and knotted leaf genes?
           
C.    Diagram the genotype of the P and F1 plants
used in these crosses.
           
D.    Draw a chromosome map with the correct
distances (rounded to one decimal point) noted between adjacent