In plants, this manipulation can also help improve the properties of a species without the addition of foreign DNA.

The name refers to the ability of the technique to create desired genetic changes without leaving any foreign DNA in the genome.

With this methodology, nearly 100% of the animal cells may take up the foreign DNA.

We found traces of foreign DNA in his neck.

Gene delivery is the process of introducing foreign DNA into host cells.

The team started by examining items from Joanna's home, looking for foreign DNA.

It has even proved possible to detect foreign DNA later in the cells of the body.

The cloning procedure involves the generation of two vector arms which are then joined to the foreign DNA.

"If you just tell people we're putting foreign DNA into the brains of small children, jaws drop," she said.

These cells are very fragile but take up foreign DNA at a high rate.