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Tails

tail sheath

The protoplasmic envelope in the tail of a spermatozoon.


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Genomic Imprinting In Humans (and classical genetics)

Methylation of histones. The allele is wrapped around the histones, and when their tails are methylated, the histones stay closely condense and do not let any transcription factors bind to their elements for transcription. So you can have the allele, but it won't ...

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by kolean
Mon Jul 20, 2009 9:12 pm
 
Forum: Genetics
Topic: Genomic Imprinting In Humans (and classical genetics)
Replies: 7
Views: 342

Re: Intelligent Design?

... with additional code. The theory explains what is required for intelligence to exist, in the first place. Selection pressures such as peacock tails are taken one at a time and they relate to intelligence, not thrown into a fuzzy Natural Selection bag that does not help model/explain the mate-selecting ...

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by GaryGaulin
Fri Apr 10, 2009 9:05 am
 
Forum: General Discussion
Topic: Intelligent Design?
Replies: 27
Views: 2317

changes of allele frequency with selection

... Aa aa at the QTL ( only one QTL is supposed to exist) the difference in allele frequency as a result of one step selection , carried out at both tails of the phenotypic normal distribution, is =iD/4 where i is the standardized selection differential D= is the proportional effect of the QTL equal ...

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by nena77
Thu Feb 26, 2009 8:57 am
 
Forum: Genetics
Topic: changes of allele frequency with selection
Replies: 0
Views: 325

amphipathic molecule

because in a bilayer you have all the hydrophilic heads at the exterior and the hydrophobic tails together on the inside. In a monolayer, you have the hydrophilic heads on one side and the hydrophobic tails on the other, so one of the sides has to be hydrophobic.

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by MrMistery
Thu Jan 22, 2009 2:31 am
 
Forum: Cell Biology
Topic: amphipathic molecule
Replies: 3
Views: 761

Control of embryonic gene translation

... I remember reading that the poly-A-binding protein is one of the receptors for nuclear export 2. If this were not the case, the mRNAs with short tails would soon be degraded(the tail generally keeps the mRNA from being degraded too fast) 3. Poly-A polymerase and the proteins that recruit it to ...

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by MrMistery
Sun Dec 14, 2008 2:10 am
 
Forum: Genetics
Topic: Control of embryonic gene translation
Replies: 1
Views: 511
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