Question: I need help solving this problem You want to study fur color in mice, which is a gray/brown color…

I need help solving this problem

You want to study fur color in mice, which is a gray/brown color
called agouti in wildtype mice. To do so you isolate mutants with
different fur colors. Below are the phenotypes of single and double
mutant mice. Assuming that all your mutations are null alleles, and
you are looking at a biosynthetic or metabolic pathway,

Draw the pathway for synthesis of the normal agouti fur color,
indicating the point of action of each gene product.

mutant 1 :
yellow                                
mutant 1 and 3 :  
yellow                    

mutant 2 :
white                      
           
mutant 1 and 2 :   white

mutant 3 :
brown                                
mutant 3 and 5 :   brown

mutant4 :
gray                        
           
mutant 4 and 5 : black

mutant5 :
black           

           
2             
1                
3           
  5        
   4

White ->
yellow -> brown ->
black -> gray ->
agouti