Non genetic RNA is a RNA molecule which doesn't act as a genetic material. In certain viruses like RNA viruses and some bacteriophage, where a single or double stranded RNA molecule acts as a genetic material similar to DNA in eukaryotic cells. It has ability to self replicate without DNA. This RNA molecule is a genetic one. Where as in eukaryotic cells and bacteria RNA doesn't play role of genetic material. It acts as amino acid carrier tRNA or messenger molcule mRNA and some other functions. This RNA molecules are non genetic one.

Anon-coding RNA(ncRNA) is anRNAmolecule that is nottranslatedinto aprotein. TheDNAsequence from which a functional non-coding RNA is transcribed is often called an RNAgene. Abundant and functionally importanttypes of non-coding RNAsincludetransfer RNAs(tRNAs) andribosomal RNAs(rRNAs), as well as small RNAs such asmicroRNAs,siRNAs,piRNAs,snoRNAs,snRNAs,exRNAs,scaRNAsand thelong ncRNAssuch asXistandHOTAIR.

The number of non-coding RNAs within the human genome is unknown; however, recenttranscriptomicandbioinformaticstudies suggest that there are thousands of them.[1][2][3][4][5][6]Many of the newly identified ncRNAs have not been validated for their function.[7]It is also likely that many ncRNAs are non functional (sometimes referred to asjunk RNA), and are the product of spurious transcription.[8][9]

Non-coding RNAs contribute to diseases includingcancerandAlzheimer's.