In their genome, genetically-modified organisms contain one or more genes from another organism carrying a useful trait. These new genes (known as transgenes) provide the organism with characteristics that it does not naturally possess. To make a GM plant, a useful gene belonging to another organism must first be isolated by inserting it into bacteria. Next, it must be extracted and introduced into the cell of the plant to be modified. It is then necessary to select the cells that have assimilated the gene. Once this has been done, the cells are grown in vitro to form plantlets
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