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Founder effect

Founder effect

The establishment of a new population by a few original founders (in an extreme case, by a single fertilized female) which carry only a small fraction of the total genetic variation of the parental population [Ernst Mayr, 1963]. The result is that a given allele, gene, chromosome, or part of a chromosome found in members of the population can be traced back to one ancestral individual.


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Re: Why do Africans have large noses and lips?

... people vs. French people's lips, is that language seems to have an effect on lips size. A lot of English people have very thin lips, especially ... attribute people's looks in a population to a possible etiology of founder effect, migration and basically gene drift. You dont always have ...

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by david23
Sun Jul 08, 2012 2:46 pm
 
Forum: Human Biology
Topic: Why do Africans have large noses and lips?
Replies: 31
Views: 210655

Founder Effect/Bottle Neck Effect and Chromosomal reversal?

... Does this sound about right? But what I was interested in was if a founder effect, or a bottle neck effect can ever leave any kind of lasting 'trace' in the genetic history ...

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by jebus197
Sun Jan 22, 2012 11:23 pm
 
Forum: Evolution
Topic: Founder Effect/Bottle Neck Effect and Chromosomal reversal?
Replies: 5
Views: 3446

Founder Effect/Bottle Neck Effect and Chromosomal reversal?

Hi once diversity has been lost due to a founder effect, or a bottle neck effect, can it ever be restored? That is to say that for example the can the ...

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by jebus197
Sun Jan 22, 2012 1:11 pm
 
Forum: Evolution
Topic: Founder Effect/Bottle Neck Effect and Chromosomal reversal?
Replies: 5
Views: 3446

Re: Spread of recessive genes

... another evolutionarily advantageous gene. Aptitude also mentioned the founder effect, which is another common cause. It could also just be due to random selection (genetic ...

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by zombiesagan
Tue Nov 15, 2011 9:07 pm
 
Forum: Genetics
Topic: Spread of recessive genes
Replies: 5
Views: 7779

Re: Spread of recessive genes

... individual. The reason why Estonians would have blue eyes is due to the founder effect. In the past, a blue-eyed human, or a group of closely related humans with blue eyes, ...

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by aptitude
Mon Oct 10, 2011 3:05 am
 
Forum: Genetics
Topic: Spread of recessive genes
Replies: 5
Views: 7779
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