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.
