1.

In and interrupted mating experiment, it is seem that the after 10 mins AziR gene in recipient, after 20 minuites there is appearance of tonR and after 15 mins the recipient is lac+ , but the recipient is almost never his+. Where in the genome is the ori of transfer?

A. Between Azi<sup>R</sup> and Ton<sup>R</sup> genes
B. Between Ton<sup>R</sup> and Lac<sup>+</sup>
C. Between Lac<sup>+</sup> and His<sup>+</sup>
D. Between His<sup>+</sup> and Azi<sup>R</sup>
Answer» E.


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