Dictionary » P » Persistence

Persistence

persistence

1. The tendency of a cell to continue moving in one direction: an internal bias on the random walk behaviour that cells exhibit in isotropic environments.

2. Of viruses that persist in a cell population, animal, plant or population for long periods often in a nonreplicating form, by such strategies as integration into host dNA, immunological suppression or mutation into forms with slow replication.


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lactase persistence - middle east

Hi -- I'm looking for historical dating information about lactase persistence in the area between modern day Iraq and Egypt. I have plenty of information about Europe, Turkey and points north and west, Africa south and west of Egypt, and Saudi Arabia. But ...

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by andygee
Tue Mar 05, 2013 3:22 pm
 
Forum: Genetics
Topic: lactase persistence - middle east
Replies: 0
Views: 47

Re: Theories - Origin of Life

... the genome, including DNA insertions, deletions and rearrangements. Genetic variation is generated continuously by the mutational process, but its persistence in the genome is determined by different historical and genomic factors. ...and you said that the first contradicted the other two. As I ...

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by AstraSequi
Tue Mar 27, 2012 2:21 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534355

Theories - Origin of Life

... random chance of a copying error when DNA is replicated. The authors go on to discuss the impact of selective pressures and genetic drift on the persistence of mutations: "For any given mutation, the chance of going to fixation (replacing the wild-type in the population) is dependent on ...

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by Luxorien
Sat Mar 10, 2012 5:03 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534355

Re: Theories - Origin of Life

... F Wright, MRC Human Genetics Unit, Edinburgh, UK has this to say Genetic variation is generated continuously by the mutational process, but its persistence in the genome is determined by different historical and genomic factors. http://evolution.unibas.ch/teaching/evol_genetics/3_Population_Genetics/reading/Genetic_Variation_Polymorphisms_and_Mutations.pdf ...

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by scottie
Tue Feb 28, 2012 7:27 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534355

Re: Theories - Origin of Life

... get incorporated into the continents? This could not have occurred by direct oxidative weathering because that is contradicted by the persistence of detrital uraninite and pyrite in Archean sediments. Science, Kasting, Vol. 293, 3 August 2001, “The Rise of Atmospheric Oxygen”, page ...

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by scottie
Wed Oct 05, 2011 10:11 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534355
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