Cloning a gene using a plasmid. (1) Chromosomal DNA of organism A. (2) PCR. (3) Multiple copies of a single gene from organism A. (4) Insertion of the gene into a plasmid. (5) Plasmid with gene from organism A. (6) Insertion of the plasmid in organism B. (7) Multiplication or expression of the gene, originally from organism A, occurring in organism B.

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Cloning a gene using a plasmid. (1) Chromosomal DNA of organism A. (2) PCR. (3) Multiple copies of a single gene from organism A. (4) Insertion of the gene into a plasmid. (5) Plasmid with gene from organism A. (6) Insertion of the plasmid in organism B. (7) Multiplication or expression of the gene, originally from organism A, occurring in organism B.