How are the cleaved DNA fragments from two sources able to recombine?

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enotechris | College Teacher | (Level 2) Senior Educator

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Cleaved DNA fragments from 2 sources can only recombine artificially.  This does not occur naturally.  Recombination is accomplished by chemically altering one strand, resulting in the removal of a sequence of bases, then altering a second DNA strand from another source with the same base sequence as the first strand, so the second strand's bases align with the first.  This creates a new molecule. See link below for a graphic: