The genetic modification technique illustrated is Agrobacterium-mediated gene transfer or Genetic engineering using Ti plasmid.

5.2. The steps involved in genetically modifying crops using this technique are:

• The desired gene (e.g., for pest resistance) is isolated from an organism.
• This gene is inserted into a Ti plasmid (tumor-inducing plasmid) from the bacterium Agrobacterium tumefaciens, creating a recombinant plasmid.
• The recombinant plasmid is introduced back into the Agrobacterium bacterium.
• The Agrobacterium then infects plant cells, transferring the Ti plasmid with the desired gene into the plant cell's chromosome.
• Transformed plant cells are selected and cultured to regenerate whole plantlets, which are then grown into transgenic plants.

5.3. Three other genetic modification techniques are:

• Gene gun (Biolistics)
• Microinjection
• Electroporation

5.4. Genetically modified organisms (GMOs) can pose a threat to food safety for human consumption in several ways:

• They may produce new allergens that could trigger allergic reactions in sensitive individuals.
• The inserted genes could lead to the production of new toxins or increase the levels of existing toxins in the food.
• The use of antibiotic resistance marker genes in GMOs raises concerns about the potential transfer of these genes to gut bacteria, contributing to antibiotic resistance.

5.5. The introduction of GMOs could benefit farmers in South Africa by:

• Developing drought-resistant crops that can withstand the adverse effects of global warming, ensuring more stable yields.
• Creating pest-resistant crops, reducing crop losses and the need for expensive pesticides, thereby improving farmers' livelihoods.
• Engineering crops with enhanced nutritional value (biofortification) to address food security and malnutrition.