[ExI] Tim May and DNA

[William Flynn Wallace]

Thanks.  You know that I don't mind making a fool of myself if I learn
something along the way.  Here's another:  the CRISPR book I read said
something about RNA(?) that went up and down the DNA making changes (sorry
- can't remember more) - maybe a sort of editing?

bill w

On Sun, Feb 10, 2019 at 4:33 PM John Clark <johnkclark at gmail.com> wrote:

>
> On Sun, Feb 10, 2019 at 4:52 PM William Flynn Wallace <foozler83 at gmail.com>
> wrote:
>
> >> Mutation is random but Natural selection is not  John
>>
>>
>> *> Let me jump back in for a sec - I will have more later, but for the
>> nonce - just how do we know John's statement is true?  I'll grant that
>> mutation by radiation is random.  bill w*
>>
>
> Well.... there is some evidence that the mutation rate increases when a
> cell is undergoing stress, and not just stress caused by radiation; but
> just like all mutations they are far more likely to make things worse not
> better. And some places on chromosomes are more fragile than other and are
> thus more prone to mutation, but aging that almost always leads to bad
> things. Given all that I still think to a first approximation it would be
> correct to say mutation is random.
>
> John K Clark
>
>
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