Gentics question: simple but no idea how

[simpleguy45]

24. What is the sequence of linked genes D, E, F, and G,
given the following recombinant frequencies?

GE: 23% ED: 15% GD: 8% GF: 15% EF: 8% DF: 7%

A. GDFE
B. GFDE
C. EFGD
D. FGDE

So..... how am i suppose to do this.

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[tttgo]

I tried drawing the map units out. GE=23, so farthest apart.
You have G _ _ E.
D is 15 from E, either to the right of left. It has to be left because it's only 15 from G.
Now you have either GD_E or G_DE.
F is closer to E than D is, so the answer is GDFE. choice A

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/L/Linkage.html

 

[NuttyEngDude]

You can do it two ways, the "best" probably is to just try each choice out and see which one doesnt violate one of the distance rules. To me that seems the fastest.

the other way is to try to figure it out like a puzzle, i enjoy these types of problems so i tend to go this route but for the purpose of hte mcat, i will use the previous method (of just looking for rule violators).