The map distances for four linked genes are as follows: A is 22 cM from B, B is 7 cM from C, C is 9 cM from D, B is

2 cM from D, A is 20 cM from D, and A is 29 cM from C. Based on these data, what is the order of these four genes on
the chromosome?



a. ABCD
b. ADBC
c. ABDC
d. BADC
e. CADB


ANSWER: b

Biology & Microbiology

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