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Expressivity

Definition

noun

The extent to which an expressed gene manifests its effect in an organism.


Supplement

Expressivity refers to the influence of an expressed gene in individuals. A variable expressivity pertains to the consistency of the gene’s influence on the individual. It occurs when a phenotype is expressed but to a different degree among individuals with the same genotype. For example , some individuals suffering from Marfan disease have long fingers and toes. Others would have a full blown disease with the dislocation of the lens and dissecting aneurysm of the aorta.


Synonym: genetic expressivity

Compare: penetrance


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Molecular gene (genome) concept scientifically untenable

... synonymous codons. Thus overall codon usage differs between taxa; but codon bias is also influenced by other factors like gene length, gene expressivity (the amount of protein made per gene), environment and lifestyle of the organism [15]. The codon bias gives rise to the paradox whether ...

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by PAWahid
Wed May 02, 2012 4:54 am
 
Forum: Molecular Biology
Topic: Molecular gene (genome) concept scientifically untenable
Replies: 12
Views: 20459

Re: Multiple Sclerosis symptoms explained in terms of Penetrance

... proven to be a genetic disorder. It does show signs of genetic linkage to some degree. This degree of linkage is it's relation to Penetrance and Expressivity. Hutington's disease, for example is a disease that is not considered to be fully penetrant, yet it is highly penetrant with 95% of those ...

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by Fiorellas
Tue Jul 26, 2011 4:34 pm
 
Forum: Genetics
Topic: Multiple Sclerosis symptoms explained in terms of Penetrance
Replies: 3
Views: 5292

Multiple Sclerosis symptoms explained in terms of Penetrance

... has clinical symptoms. And if they do, the symptoms are sometimes severe, or sometimes mild. How can you explain this in terms of Penetrance and Expressivity? :?:

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by ritalinn
Wed Sep 12, 2007 12:12 am
 
Forum: Genetics
Topic: Multiple Sclerosis symptoms explained in terms of Penetrance
Replies: 3
Views: 5292


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