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there's even the endogenous retroviruses that make up 5-8% of our DNA - including bits that just repeat over and over without every doing anything.


Viral origin says nothing of how important its function is.


https://sandwalk.blogspot.com/2018/03/whats-in-your-genome-p...

We don't need 1M copies of Alu: https://en.wikipedia.org/wiki/Alu_element

A lot of the sequences are defective copies. These are often how new genes arise, but they are not useful to the individual.


I don't know what I'm talking about, but I kinda thought there was some ideas maybe it's used in anti-virus or something? https://pmc.ncbi.nlm.nih.gov/articles/PMC9963469/




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