The map distances for four linked genes are as follows: A is 22mu from B, B is 7mu from C, C is 9mu
from D, B is 2mu from D, A is 20mu from D, and A is 29mu 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
B
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