Examples of recombinant DNA technology used to increase yield in crop plants are listed:
1 - Scottish Highers Biology - Question 22. - 2023
Question 22.
Examples of recombinant DNA technology used to increase yield in crop plants are listed:
1. Insertion of Bt toxin gene into cotton plants.
2. Insertion of glyphosate... show full transcript
Worked Solution & Example Answer:Examples of recombinant DNA technology used to increase yield in crop plants are listed:
1 - Scottish Highers Biology - Question 22. - 2023
Step 1
1. Insertion of Bt toxin gene into cotton plants.
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Answer
The insertion of the Bt toxin gene into cotton plants allows the plants to produce a protein that is toxic to specific pests. This reduces the need for chemical insecticides, as the plants provide their own pest resistance.
Step 2
2. Insertion of glyphosate resistance gene into maize plants.
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Answer
While this modification allows for the use of glyphosate herbicide, it could lead to increased chemical usage rather than a decrease, as farmers may rely heavily on this herbicide for weed control.
Step 3
3. Insertion of drought resistance gene into wheat plants.
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Answer
This modification helps the plants withstand drought conditions but does not directly reduce the use of chemicals. It primarily improves water efficiency.
Step 4
Conclusion
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Answer
Only the first example (1) would decrease the use of chemicals by reducing reliance on insecticides, while the other modifications either do not decrease chemical use or may increase it.
Step 5
Final Answer
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Answer
Thus, the correct answer is A: 1 only.
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