Junk DNA

From RationalWiki

"Junk DNA" (properly, noncoding DNA) is any material within a lifeform's genome that is not used in cell processes. Junk DNA is produced by a few different processes:

• Viral DNA is sometimes interpolated into a cell's genome; while the cell generally ignores it, it sometimes leads to the creation of new genetic traits when the "commenting-out" process fails. These genetic patterns can also be used to approximate a date of divergence between two closely related species.
• The cell itself can make copying errors, duplicating parts of other genes and ignoring them similar to viral interpolations.

S T U B (The Pet Goat ate it)