Please help me with this question.

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Dec 22, 2011 17:26
A sentence: "The idea of inserting these genes into nonleguminous plants, if they can be identified and isolated, is practical."

In this sentence, I want to use a pronoun "they" to refer to "genes", but not "plants".
Is this correct ? Is this kind of structure common in English ?

And I want to know whether the pronoun "they" can only be used to refer to the closest word, or you can put it in other positions and let the readers to recognize it by themselves.

Thank you for your answers.
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