Which is a genuine concern about growing genetically modified crops?
- A. The modified gene will change the DNA of the person eating the crop
- B. The introduced gene may spread by pollen to wild relatives or to non modified fields
- C. GM crops cannot reproduce at all
- D. GM crops always give lower yields than ordinary varieties
Explanation
Gene flow through pollen is a documented and measurable risk, and it can create herbicide resistant weeds or contaminate the crop of a neighbouring farmer who is not growing the modified variety. Eaten DNA is digested into nucleotides like any other DNA, so it does not enter human cells, and yields are usually equal or higher. Separating real risks from imaginary ones is the point of this question.
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