Microinjection is using a needle to inject genetic material (that contains the desired gene to be reproduced) into the recipient cell.  The recipient cell is the cell of the substance where the new gene will be incorporated.
 

A satirical picture of microinjection we found at Our Future News' website is shown below.  Please click on the picture if you wish to visit their website.

In actual microinjection, the new gene would be implanted into the recipient cell, rather than the actual tomato, as shown above.

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An example:

    If a potato is large and another large potato were desired.  The gene responsible for size could be taken and injected into the cell of a new potato.  As the new potato grows from that cell, the entire DNA will incorporate the new gene making the potato large as well.
 

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