Use the following recombination frequencies between pairs of

Use the following recombination frequencies between pairs of genes to place them along a chromosome

Gene Pair Recombination Frequency (%)

1. A and D 5

2. D and C 12

3. A and C 7

4. D and B 20

5. C and B 8

A) D-A-C-B(or B-C-A-D)

B) A-D-C-B (or B-C-D-A)

C) C-D-A-B (or B-A-D-C)

D) B-A-D-C (or C-D-A-B)

B________C_______A_____D

8 7 5

DC = DA + AC = 7 + 5 = 12

DB= DA+ AC + CB= 5 + 7 + 8 = 20

THEREFORE, option 1