Editing Mating system (section)

===Viruses===

Both animal viruses and bacterial viruses ([[bacteriophage]]) are able to undergo mating.  When a cell is mixedly infected by two genetically marked viruses, recombinant virus progeny are often observed indicating that mating interaction had occurred at the DNA level.  Another manifestation of mating between viral genomes is multiplicity reactivation (MR).  MR is the process by which at least two virus genomes, each containing inactivating genome damage, interact with each other in an infected cell to form viable progeny viruses.  The genes required for MR in bacteriophage T4 are largely the same as the genes required for allelic recombination.<ref name="pmid6261109">{{cite journal |vauthors=Bernstein C |title=Deoxyribonucleic acid repair in bacteriophage |journal=Microbiol. Rev. |volume=45 |issue=1 |pages=72–98 |year=1981 |pmid=6261109 |pmc=281499 |doi= 10.1128/MMBR.45.1.72-98.1981}}</ref> Examples of MR in animal viruses are described in the articles ''[[Herpes simplex virus]]'', ''[[Influenza A virus]]'', ''[[Adenoviridae]]'', ''[[Simian virus 40]]'', ''[[Vaccinia virus]]'', and ''[[Reoviridae]]''.