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Mobile genetic element

mobile genetic element --> transposon

(Science: molecular biology) small, mobile dNA sequences that can replicate and insert copies at random sites within chromosomes. They have nearly identical sequences at each end, oppositely oriented (inverted) repeats and code for the enzyme, transposase, that catalyses their insertion.

bacteria have two types of transposon, simple transposons that have only the genes needed for insertion and complex transposons that contain genes in addition to those needed for insertion.

eukaryotes contain two classes of mobile genetic elements, the first are like bacterial transposons in that dNA sequences move directly. The second class (retrotransposons) move by producing rNA that is transcribed, by reverse transcriptase, into dNA which is then inserted at a new site.


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Re: Theories - Origin of Life

... the acquisition of these natural occurring mobile genetic elements in tetracyclines that produces the resistance. So this is ...

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by scottie
Fri Aug 17, 2012 3:46 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 907271

A Monkey's Uncle

... within the species. one half of the genetic sequence from two individuals come together ... in ocean currents. The advantage is that a mobile organism can carry the DNA further to all ... or of creating a tool from more than one element. Nor do they see obvious advantages to crafted ...

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by narrowstaircase
Wed Mar 14, 2007 3:46 am
 
Forum: Evolution
Topic: A Monkey's Uncle
Replies: 26
Views: 57293

A Monkey's Uncle

... in ocean currents. The advantage is that a mobile organism can carry the DNA further to all ... in the quest for quality or desirable genetic matching. This allows for rapid change and, ... or of creating a tool from more than one element. Nor do they see obvious advantages to crafted ...

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by JDavidE
Sat Mar 10, 2007 9:39 pm
 
Forum: Evolution
Topic: A Monkey's Uncle
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The Fiber Disease

... Beckman Center in Irvine, CA. Transposable elements as sources of variation in animals and ... There is little doubt that TEs provide new genetic variation on a scale, and with a degree ... variation associated with the activity of mobile elements. Mutant phenotypes range from subtle ...

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Tue Nov 14, 2006 8:04 pm
 
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Topic: The Fiber Disease
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by London
Sun Sep 03, 2006 11:51 am
 
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