Definition of junk DNA in English:

Share this entry

junk DNA


[mass noun] Genetics
DNA that does not code for a protein, usually occurs in repetitive sequences of nucleotides, and does not seem to serve any useful purpose.
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.
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.