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Old 06-15-2009   #681 (permalink)
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Re: Darwin re-visited retrotransposons & Natural Selection

Quote:
Originally Posted by Michaelangelica View Post
More epigenetics, or something else going on?
This process must speed up genetic changes but should't there be more genetically damaged (or exceptional) people?
This is a really interesting development, MA. Your point is valid, but since the retrotransposon activity is embryonic, it also suggests that genetic changes that would result in death of a fertilized ovum now will only result in death of an early embryo cell. Essentially, it raises the probability of embryonic survival, and increases the probability off a functional cell mosaic (whether good or bad).

Really interesting. Also, I never saw the numbers (noted in the summary) that L1 retrotransposons are 17% of the human genome. This is roughly six times the portion that transcribes proteins.

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