A short time ago I wrote a piece about speculation that genetic engineering of the Aedes Aegypti mosquito may have brought about a change in the Zika virus that is responsible for the virus's ability to cause microcephaly. Speculation is just that, nevertheless the very fact that such changes are possible, makes consideration of the science fascinating. CRISP-Cas9. This allows scientists to snip a piece of DNA and replace it with a different piece. This type of targeting is in its infancy but the technique is there and will become more precise very quickly. CRISPR stands for "clustered, regularly interspaced short palindromic repeats." It is the quality of some bacterial DNA that enables them to create RNA, a single strand version of DNA, that seeks out DNA that matches its series of bases The bacteria then sends a protein called 'Cas9' to attack the marked DNA. The Cas9 can also be used to destroy and replace the targeted DNA with something better.
The science is pretty difficult for folks without a science background and for some, like myself, who do. A nice youtube diagrammatic explanation is worth looking at. 'CRISPR/Cas9 -how it works.'
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