Genes

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

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Waters2
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Genes

Post by Waters2 » Wed May 25, 2005 10:50 pm

what is pleiotropy???and also Epistosis????Can anyone tell me???pls

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EmmVeePee
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Post by EmmVeePee » Wed May 25, 2005 11:07 pm

Pleiotropy is when a gene has more than one phenotypic expression. There are plenty of examples, but I can't think of any.

I assume you mean Epistasis. Epistasis is when one gene controls whether another is expressed or not. But it isn;t like dominance and recessive genes, where the dominant one trumps the recessive.
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Pennsylvania State University

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victor
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Epistasis

Post by victor » Thu May 26, 2005 12:29 pm

I can think that Epistasis is some kinda dominance that expressed when two or more alleles which controlling one phenotype (usually color phenotype) meet each other (when two organisms are mated). In this matter Epistasis can be detected when two dominant alleles meet each other but only one of them is shown as phenotype. In this case another allele which is 'beaten' by the Epistasis allele is called hipostasis.

Waters2
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Post by Waters2 » Thu May 26, 2005 10:18 pm

I think i get a bit of image of it but can u give me a related website so i can know more about it..... :)

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thank.darwin
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Post by thank.darwin » Sun May 29, 2005 11:29 pm

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.
-Albert Einstein

Waters2
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Post by Waters2 » Wed Jun 01, 2005 12:17 pm

thank u for ur information...

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kandarp shah
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about pleiotrophy

Post by kandarp shah » Sat Jun 04, 2005 3:22 pm

as my knowledge i have found that One gene that causes many different physical traits such as multiple disease symptoms.

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jadsky
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Post by jadsky » Mon Oct 03, 2005 10:40 pm

go to http//www.yahoo.com and search for your help chances are you'll get answers
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bortz99
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Re: Genes

Post by bortz99 » Fri Jun 26, 2009 10:31 pm

Sickle-cell disease is a good example of pleiotrophy, the carrier of this recessive trait will have a phenotype of lets say Ss but they do not have Sickle-cell symptoms like the SS phenotype. However even in the Ss type some sickle-cells are created this is why they are resistant to malaria.

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