[<1/1,000,000th%]

All DNA has a purpose.

This is one of the current speculations. Because some sections of the genome have been shown to overlap, it may be that the "junk DNA" speculation is wrong, and a lot of this DNA codes for things not currently in use, or for structures that appear during development but disappear at birth, like lungs.

Surprisingly, g3 may have this correct. Don't go looking for proof though. It'll be decades before this gets sorted out, if then.

[Doctor Stochastic]

Maybe it has some purpose or not. G3k didn't guess though. He claims that all DNA had purpose. I think his theories should be held to the same standards that he wants other theories to comply with. What is purpose of the extra DNA in tetraploids or in XXY or XYY individuals? What is the purpose of the viral DNA that chimps and humans have in their genome in the exact same place?