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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Atavism

... ones that have some appearance at birth), and they are definitely tails. Tails (post-anal) are a shared feature of all mammals, and the embryonic persistence is definite evidence of shared ancestry.

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by Darby
Tue Aug 20, 2013 11:19 pm
 
Forum: Human Biology
Topic: Atavism
Replies: 4
Views: 2850

Re: Re:

... before) and found no reference to what you are claiming. The closest thing that could have led to your misunderstanding was the bit about lactase persistence. If this is what you think refers to the appearance of a new gene, look up definitions of "allele" and "gene", then ...

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by Cat
Sat Jul 13, 2013 12:57 am
 
Forum: Evolution
Topic: Is evolution as simple as we think?
Replies: 38
Views: 23090

Re: Re:

... before) and found no reference to what you are claiming. The closest thing that could have led to your misunderstanding was the bit about lactase persistence. If this is what you think refers to the appearance of a new gene, look up definitions of "allele" and "gene", then ...

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by wbla3335
Mon Jul 08, 2013 9:34 pm
 
Forum: Evolution
Topic: Is evolution as simple as we think?
Replies: 38
Views: 23090

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: 879

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: 562
Views: 929086
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