In the gene-for-gene resistance mechanism, if a plant has a resistance gene and a pathogen has the matching Avr gene, the

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If a plant has a resistance gene and a pathogen has the matching Avr gene, it triggers the gene-for-gene resistance mechanism. This mechanism works by the plant being able to "recognize" the pathogen's Avr gene, leading to the activation of the plant's resistance gene, which then produces proteins that can inhibit the pathogen's growth, ultimately leading to the plant being resistant to the pathogen. Therefore, the correct answer is that the plant will be resistant to the pathogen. Option A is incorrect because the pathogen's gene does not override the plant's gene, and the plant is not infected. Option B is incorrect because the gene-for-gene mechanism does not make the plant susceptible. Similarly, option D is incorrect because the gene-for-gene mechanism is specific to the matching Avr gene and does not make the plant resistant to all pathogens. Finally, option E is incorrect because plants cannot copy genes from pathogens.

In the Gene-For-Gene Resistance Mechanism, If a Plant Has a Resistance