Viruses Did Not Evolve, Either


Viruses have a bad reputation. They are ultra-tiny, well-designed machines that copy themselves in a process that sometimes causes disease in the organisms in which they reside. One class called retroviruses is equipped with machinery that splices its own viral code into the DNA of a host cell.
Retroviruses have been portrayed as genetic "leftovers" from an evolutionary past, but how did they really originate?
A report published in Science showed how one retrovirus was "born." Researchers discovered that a retrovirus named XMRV was formed when two DNA sequences called "proviruses" were brought together through "recombination." This occurs during gamete development when genetic material from the parent cells is rearranged into new combinations of genes in the offspring, resulting in more genetic variations.
You can catch the rest of "Were Viruses Created or Evolved?" here.

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