F
Fred Bloggs
Guest
On Monday, July 3, 2023 at 1:42:25â¯AM UTC-4, Anthony William Sloman wrote:
If the mutation is of biological origin, it is NOT random. High energy cosmic particle, yes; biological, no. If you\'re not one of those weird nematodes, you don\'t need to worry about transposons.
The system is focused on self-preservation. Ideally ANYTHING out of the ordinary is destroyed. Talking about mutations, one form of immune response to pathogen infection is to mutate the pathogen RNA/ DNA in a way to make it less pathogenic, by way of mutagenic enzyme secretion. It\'s a two way street there. SARS-CoV-2 was mutated to become far less pathogenic and in a way to exponentially out-replicate the original strain, causing it to die out. The price for this was higher viral loads and therefore increased infectivity, but the infection was comparatively far less severe, almost innocuous.
On Monday, July 3, 2023 at 12:41:40â¯AM UTC+10, John Larkin wrote:
On Sun, 2 Jul 2023 06:06:41 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:
On Sunday, July 2, 2023 at 1:42:30?AM UTC-4, Jan Panteltje wrote:
Horizontal Gene Transfer HGT
Virus-like transposons wage war on the species barrier
https://www.sciencedaily.com/releases/2023/06/230629193248.htm
Wow!
So do a lot of other processes. Transposons have been in serious study for decades and even used in genetic engineering. But there are barriers:
\" On the other hand, host organisms have developed different mechanisms of defense against high rates of transposon activity, including DNA-methylation to reduce TE expression [30-33], several RNA interference mediated mechanisms [34] mainly in the germ line [35, 36], or through the inactivation of transposon activity by the action of specific proteins [37-39].\"
And transposons can cause deletions in the DNA as easily as insertions..
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2874221/
Like mutation, gene swapping is useful, even necessary, but in moderation.
Evolution does depend on heritable changes appearing between generations, and to that extent mutations and gene swapping are necessary. Almost every change is for the worst, because they are random changes, so there is evolutionary pressure to minimise the number of changes.
If the mutation is of biological origin, it is NOT random. High energy cosmic particle, yes; biological, no. If you\'re not one of those weird nematodes, you don\'t need to worry about transposons.
If we ever get to the point of being able to do intelligent design - which presumably includes setting up a biological equivalent of LTSpice - we could probably junk the random mutation feature, or at least monitor embryo\'s early for dangerous mutations and abort before care started getting expensive.
The system is focused on self-preservation. Ideally ANYTHING out of the ordinary is destroyed. Talking about mutations, one form of immune response to pathogen infection is to mutate the pathogen RNA/ DNA in a way to make it less pathogenic, by way of mutagenic enzyme secretion. It\'s a two way street there. SARS-CoV-2 was mutated to become far less pathogenic and in a way to exponentially out-replicate the original strain, causing it to die out. The price for this was higher viral loads and therefore increased infectivity, but the infection was comparatively far less severe, almost innocuous.
--
Bill Sloman, Sydney