Cell Transformation Recombinant DNA Host Cell DNA Target gene Modified Host Cell DNA.

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Cell Transformation Recombinant DNA Host Cell DNA Target gene Modified Host Cell DNA

Transforming Bacteria During transformation, a cell takes in DNA from outside the cell. The external DNA becomes a component of the cell's DNA. ●Foreign DNA is first joined to a small, circular DNA molecule known as a plasmid. ●Plasmids are found naturally in some bacteria and have been very useful for DNA transfer.

The plasmid has a genetic marker—a gene that makes it possible to distinguish bacteria that carry the plasmid (and the foreign DNA) from those that don't. –Genes for antibiotic resistance are often used.

Transforming Bacteria Recombinant DNA Gene for human growth hormone Human Cell Bacteria cell Bacterial chromosome Plasmid Sticky ends DNA recombination Bacteria cell containing gene for human growth hormone DNA insertion

How can you tell if a transformation experiment has been successful? If transformation is successful, the recombinant DNA is integrated into one of the chromosomes of the cell. Animation Animation!

Transforming Plant Cells Complete plant generated from transformed cell. Inside plant cell, Agrobacterium inserts part of its DNA into host cell chromosome. Plant cell colonies Transformed bacteria introduce plasmids into plant cells. Agrobacterium tumefaciens Cellular DNA Gene to be transferred Recombinant plasmid

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