1) Japanese porcelain 2) Worthless inheritance 
See Intron. 
That portion of DNA which is not transcribed and expressed, comprising about 90% of the 3 billion base pairs of the human genome; its function is not known. ... (05 Mar 2000) ... 
Stretches of dna that do not code for genes
Genomic DNA that serves, as yet, no known function.
Type: Term Definitions: 1. that portion of DNA that is not transcribed and expressed, comprising a major fraction of the base pairs of the human genome; much of this DNA is repetitive in seuqence and appears to serve no purpose; its function is not known. segments of DNA that appear to serve no function and are replicated along with the rest of the...
Junk DNA: Noncoding regions of DNA that have no apparent function. The term 'junk DNA' is a disparaging one, expressing some of the disappointment felt by geneticists when they first gazed upon sizable segments of the genetic code and, instead of seeing one wonderful gene after another, they saw a few exons surrounded by vast stretches of 'junk DNA...
[n] - stretches of DNA that do not code for genes
Slang term usually used in referring to the non-coding region of DNA on the Y-chromosome. For more about junk DNA see
segments of DNA that have no apparent genetic function.