what are the different ways to introduce alien DNA into host cell

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Please find below the solution to the asked query:
Different ways to introduce alien DNA into the host cell are as follows:

• Micro injection is the process of introducing foreign DNA into the host cell by injecting the DNA directly into the nucleus by using micro needle or micro pipette.
•  Electroporation is the process by which transient holes are produced in the plasma membrane of the host cell to facilitate entry of foreign DNA.
•  Gene gun is the technique of bombarding micro projectiles coated with the foreign DNA with great velocity into the target cell. 

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