Question

QUESTION 10

1. Each recipient strain below is transduced with phage grown on wild-type bacteria. Wild-type recombinants are counted for each recipient type. These results are summarized below: What is the order of these loci?

   Recipient	# wild types	Recipient	# wild types
   gly- asp- phe+ cys+	27	gly- asp+ phe- cys+	118
   gly- asp+ phe+ cys-	0	gly+ asp- phe- cys+	123
   gly+ asp- phe+ cys-	167	gly+ asp+ phe- cys-	7
   gly- asp+ phe+ cys+	335	gly+ asp- phe+ cys+	362

   		gly - asp - phe - cys
   		asp - gly - phe - cys
   		asp - phe - gly - cys
   		gly - phe - asp - cys

Answer 1

Second statement is right.

We have to arrange the givan on the basis of colony number. The greater the colony number the smaller will be the distance between them.

Now asp is closer to cys than gly than phe.

asp, phe, cys are adjacent to each other.

Gly, phe are closer to each other.

The following plamsid is obtained: