Path: ...!weretis.net!feeder9.news.weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Jeroen Belleman Newsgroups: sci.electronics.design Subject: Re: OT: Dynamic DNA structures and the formation of memory Date: Mon, 13 May 2024 17:03:20 +0200 Organization: A noiseless patient Spider Lines: 71 Message-ID: References: <77r24jloc6k59o98o9nb47j8ul3n3ngh6a@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Mon, 13 May 2024 17:01:21 +0200 (CEST) Injection-Info: dont-email.me; posting-host="052c3891a3d02445bb3b80166ef6aef5"; logging-data="3712222"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/491vlN6YdrpnCYWjgpZm8" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Cancel-Lock: sha1:Pq9st5eJBTS7hycZlnvEvn3SKTA= Content-Language: en-US In-Reply-To: Bytes: 4438 On 5/13/24 16:13, John Larkin wrote: > On Mon, 13 May 2024 09:54:25 -0400, Joe Gwinn > wrote: > >> On Sun, 12 May 2024 18:30:32 -0700, John Larkin >> wrote: >> >>> On Sun, 12 May 2024 21:21:56 -0400, "Tom Del Rosso" >>> wrote: >>> >>>> John Larkin wrote: >>>>> On Sun, 05 May 2024 05:36:06 GMT, Jan Panteltje >>>>> wrote: >>>>> >>>>>> Dynamic DNA structures and the formation of memory >>>>>> https://www.sciencedaily.com/releases/2024/05/240501125755.htm >>>>>> Summary: >>>>>> An international collaborative research team has discovered that >>>>>> G-quadraplex DNA (G4-DNA) accumulates in neurons and dynamically >>>>>> controls the activation and repression of genes underlying long-term >>>>>> memory formation. >>>>>> >>>>>> >>>>>> >>>>>> I have always though that memory could be stored as DNA sequenxes... >>>>> >>>>> More likely RNA or some other protein. >>>>> >>>>> The oft-mocked Lamarckian concept, of genetic learning (not just >>>>> natural selection) is probably real, and some reverse transcription >>>>> does happen, namely that DNA is edited within the life of one >>>>> organism. But remembering where you left your glasses is probably >>>>> handled at a lower level than editing your chromosones. >>>> >>>> But how can it be passed down as Lamarck thought, if the eggs in the >>>> ovaries are formed early? If genetic memory could be passed down it >>>> would be only from the father because sperm are formed recently. But the >>>> sperm spawn from local cells. If DNA is edited to store memory then >>>> would these changes be duplicated in all cells in all tissues? How else >>>> would the changes get into sperm cells? How could they get into eggs? >>>> >>> >>> If it is advantageous for a woman's life experiences to be passed onto >>> her children, nature will find a way. >> >> Yes, but that is not the issue. Lamark claimed that it could be done >> very quickly, in the lifetime of one woman, versus over generations >> (where DNA controls). Actually, Lamark was focused on Wheat, >> specifically can one train wheat to grow in Siberia; this was very >> attractive to Stalin. Turns out you cannot. >> >> But there is a twist. There was a study of the effect of mass >> starvation of the Swedish population which showed that one could >> detect the effect of starvation of grandfathers on their >> grandchildren. It is thought that this is mediated by epigenetic >> information carried in methyl tags on the DNA, but I don't know if >> that was ever sorted out. "Överkalix study": >> >> . >> >> Joe Gwinn > > > Classic evolution, random mutation and selection, is absurdly > inefficient. Why wouldn't species use something better? Because the > scientific establishment doesn't approve? > *One* species may be on the verge of inventing something better... Jeroen Belleman