from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A section of DNA that contains the genetic code for a single polypeptide and functions as a hereditary unit.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Sometimes used interchangeably with the word gene, a cistron is the unit of hereditary material (e.g. DNA) that encodes one protein.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity
From cis-trans test, a genetic test (cis- + trans-) + -on1.(American Heritage® Dictionary of the English Language, Fourth Edition)