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An '''Endogenous retrovirus''' (ERV) is genetic insertion in an organism's genome from an inactivated [[retrovirus]]. A retrovirus stores its genetic information in [[RNA]] and must reverse transcribe it into [[DNA]] before insertion into the host's genome. This process is prone to error and sometimes the errors will inactivate the gene. When these inactivate genes are inserted in the [[germ line]] of the host all its descendants will also have the inactivated insertion. Human endogenous retroviruses (HERV) have been linked to several autoimmune diseases such as [[multiple sclerosis]].  

An '''Endogenous retrovirus''' (ERV) is genetic insertion in an organism's genome from an inactivated [[retrovirus]]. A retrovirus stores its genetic information in [[RNA]] and must reverse transcribe it into [[DNA]] using the protein Reverse Transcriptase before insertion into the host's genome using the protein DNA Integrase, both of which are packaged inside the capsid with the viral RNA. This process is prone to error and sometimes the errors will inactivate the gene. When these inactivate genes are inserted in the [[germ line]] of the host all its descendants will also have the inactivated insertion. Human endogenous retroviruses (HERV) have been linked to several autoimmune diseases such as [[multiple sclerosis]].  

Although some have claimed that endogenous retroviruses are evidence for common descent, creationists rightfully assert that this is not the case.<ref>http://www.trueorigin.org/theobald1e.asp</ref><ref>http://www.answersingenesis.org/articles/am/v1/n2/were-retroviruses-created-good</ref><ref>http://www.answersingenesis.org/docs2006/1219herv.asp</ref>

Although some have claimed that endogenous retroviruses are evidence for common descent, creationists rightfully assert that this is not the case.<ref>http://www.trueorigin.org/theobald1e.asp</ref><ref>http://www.answersingenesis.org/articles/am/v1/n2/were-retroviruses-created-good</ref><ref>http://www.answersingenesis.org/docs2006/1219herv.asp</ref>