In transduction, bacterial genes become packaged into a viral coat, are transferred to another bacterium by the virus, and become incorporated into the bacterial chromosome by crossing over. Bacterial genes can be mapped with the use of generalized transduction.

Specialized transduction Like generalized transduction, specialized transduction requires gene transfer from one bacterium to another through phages, but here only genes near particular sites on the bacterial chromosome are transferred. This process requires lysogenic bacteriophages. The

A donor strain of bacterium is infected with phage.

In phage reproduction, the bacterial chromosome is fragmented.

.and some of the bacterial genes become incorporated into a few phages.

After lysis of the cell, transducing phages are released.

Phage \ DNA V

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