transposon

[trans-poh-zon]
Genetics.
a segment of DNA that is capable of inserting copies of itself into other DNA sites within the same cell.

Origin:
1974; transpos(ition) + -on1

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World English Dictionary
transposon (trænsˈpəʊzɒn)
 
n
genetics a genetic element that can move from one site in a chromosome to another site in the same or a different chromosome and thus alter the genetic constitution of the organism
 
[C20: from transpos(e) + -on]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

transposon trans·po·son (trāns-pō'zŏn)
n.
A segment of DNA having a repeat of an insertion sequence element at each end as well as genes specific to some other activity such as resistance to antibiotics; it is capable of migrating to a new position within the same or another chromosome, plasmid, or cell and thereby transferring genetic properties.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
transposon   (trāns-pō'zŏn)  Pronunciation Key 
A segment of DNA that is capable of independently replicating itself and inserting the copy into a new position within the same or another chromosome or plasmid. Transposons act somewhat similarly to viruses and in humans are an underlying cause of hemophilia, certain cancers, and other diseases. In other organisms, they can become a permanent and even beneficial part of the genome, as in maize corn, where transposons account for half the genome, and certain bacteria, where genes for antibiotic resistance can spread by means of transposons. Also called jumping gene.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
transposon [(trans-poh-zon)]

Segments of DNA that shift from one area of a genome to another. Previously called jumping genes.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
One particular transposon first appeared about a million years ago.
Transposon-mediated rewiring of gene regulatory networks contributed to the evolution of pregnancy in mammals.
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