mtl,polA,and xyl are bacterial genes that can be transmitted using an Hfr strain.An interrupted mating experiment resulted in xyl exconjugants appearing at 7 minutes and reaching maximum level by 30 minutes.The mtl gene function exconjugants appeared at 11 minutes and leveled off at 80% maximum by about 33 minutes,while polA did not appear until 24 minutes into the experiment and then only slowly rose to about 30%.Which of the following shows the gene order with the insertion site (arrow) location correctly?
A) xyl mtl polA →
B) polA mtl xyl →
C) mtl xyl polA →
D) mtl polA xyl →
E) None of these
Correct Answer:
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