Concepts

DNA may be transferred between bacterial cells through conjugation, transformation, or transduction. Each type of genetic transfer consists of a one-way movement of genetic information to the recipient cell, sometimes followed by recombination. These processes are not connected to cellular reproduction in bacteria.

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(a) Conjugation

Donor Recipient cell cell cell cell

Cytoplasmic bridge forms.

DNA replicates and transfers from one cell to the other.

Cells separate.

A crossover in the recipient cell leads to...

.. .creation of a recombinant chromosome.

Bacterial chromosome

(b) Transformation

Cytoplasmic bridge forms.

DNA replicates and transfers from one cell to the other.

Cells separate.

A crossover in the recipient cell leads to...

.. .creation of a recombinant chromosome.

Donor Recipient cell cell cell cell

Bacterial chromosome

Naked DNA is taken up by the recipient cell.
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