We should go back to circular dna and call it a day.

Have you another proposition for a molecule which can store information like the DOUBLE Helix DNA is???...

There's single stranded DNA viruses out there. Possibly holdovers, though evolution dropping a strand to reduce size is logical as well.

THANK You for this Information!!!... I will look in the Internet for it...

Ok i just cant help myself. This thread seems to speak of triples helices oit of context from reality. 

Sure if you dont line up the 3rd set of chromosones to the 1st and 2nd then yes you will end up with a block or a repression.

But that is not how we find double or triples helices in nature. 

 

Take humans for example xx and xy. On either or xx or xy if these were not copies of each other then they would always block or repress gene funtion. But they are copies execpt for the parts they are not in relation to X and Y. Just some open and closed ended peices of DNA swtiched. 

Any X chromosone can be turned into a Y and vice versa by replaceing select closed pieces for open on X and vice versa for Y, open to closed. 

Now the ladder example makes no sense. It does not relate to whats going on at all. The difference between single, double and triple helices is akin to single, double or triple phase electricity. A single, double or triple phase feedback system.

The thread is old and doesn't make a lot of sense,  but the helix is on the DNA, nit chromosomal level.

On 8/31/2005 at 3:45 PM, Xyph said:

Does it exist? Can it exist? Could it evolve naturally? Are there any inherent advantages to being a triple-helixed animal? How would a triple-helix lifeform differ from a double-helixer? What about multiple helixes? What effects would DNA of multiple helixes have on the creature that possessed it?

naturally occurring sequences capable of forming a triple DNA helix are quite common in human genomes, with a frequency of ~1 in every 50,000 bp, usually in the regions of our genomes used for regulation of how genes are to be used - Merogenomics