Unless the other 10 strands materialize out of nothing, they are probably already contained in our DNA, in which case they would be known as "junk DNA" - then it would be more a matter of activation than physical growth of these strands. Because if the ten strands were to materialize and then physically intertwine with the present two, wouldn't the body become five times heavier or denser? But if they are already present, this problem wouldn't arise.
Another possibility is that the other ten strands aren't 3rd density, but rather hyperdimensional. I'm not sure what could detect this, other than kirlian photography or superconducting quantum interferenced devices (SQUIDS). Perhaps the conductivity of DNA would vary according to how many strands it had.
Anyway, here are some relevant articles:
http://www.psrast.org/junkdna.htm
(explains that junk DNA contain sequences that are not random, but follow purposeful structure much like human language. This goes to show it probably serves a function and isnt' all random junk)
http://news.bbc.co.uk/2/hi/science/nature/3703935.stm
(here they explain that even fruitflies and mice have junk DNA, which puts down the idea that junk DNA has anything to do with hyperdimensional existence. However, it is curious that animals are telepathic and most humans are not, so it might make sense after all)
http://atheism.about.com/library/FAQs/e … ence12.htm
(this one talks about junk DNA representing natural "errors" in the genetic code. Hmmm...maybe a better explanation would be purposeful sabotage of our genetic code?
http://www.fortunecity.com/greenfield/bp/16/kirlian.htm
(can kirlian photogaphy be used to detect scalar fields? That's the question asked in this article. Something to think about....the aura could be explained as a scalar magnetic field, that is, a field "beneath" the type of magnetism ordinarily detectable.
http://www.kirlian.org/kirlian2.htm
(good summary of findings of kirlian photography. Very interesting)
Acquiring fringe knowledge is like digging for diamonds in a mine field.