A herbicide-resistance gene could pass from a GM crop to a related wild plant through pollination. Scientists want to reduce this risk.
Which modification would most directly reduce transfer through pollen while retaining herbicide resistance in the crop?
Prevent the crop from producing ripe fruit.
Increase the crop’s uptake of mineral ions.
Prevent the crop from producing viable pollen.
Increase the crop’s tolerance to herbicide.
44 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.