Definition of junk DNA in English:

Share this entry

junk DNA


Genomic DNA that does not encode proteins, and whose function, if it has one, is not well understood.
Example sentences
  • Zimmer also brings up the argument that simply by making the genome bigger that junk DNA may serve a useful function by making cells the correct size.
  • Ohno also proposed that a large proportion of the mammalian genome is noncoding or junk DNA.
  • Since junk DNA does not code for proteins, mutations can accumulate within it without natural selection weeding them out.

For editors and proofreaders

Syllabification: junk DNA

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.