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Epistasis vs. Polygenic Inheritance

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Epistasis vs. Polygenic Inheritance

Postby Edher » Thu Mar 03, 2005 7:49 am


What is the exact difference between Epistasis and Polygenic Inheritance?

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Postby mith » Thu Mar 03, 2005 8:30 pm

I don't remember epistasis but polygenic inheritance is when a single trait is determined by more than one gene.
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Postby jonofbridger » Thu Mar 03, 2005 8:55 pm

I think epistasis is when you have a pair of genes that control the same trait where one set is dominant masks whatever the other set is.
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Postby Jelanen » Fri Mar 04, 2005 1:11 am

Epistatis is a form of gene interaction in which one gene masks the phenotypic expression of another. Polygeneic inheritance is when multiple genes are involved in the phenotypic expression of a single trait. Its not really an either or thing, I'm sure (though I can't think of one off the top of my head) that there are epistatic elements to some polygenic traits.

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