Human Hair DNA

Human Anatomy, Physiology, and Medicine. Anything human!

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pkc
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Human Hair DNA

Post by pkc » Wed Apr 04, 2012 6:47 am

Is it true that hair that is cut from your head (not pulled), does not contain any nuclear dna ?

My understanding of hair structure is that it is a matrix with at least some dead cells present in various layers. Eg the outside cuticle is made of flattened cells .
Feughelman, Max Mechanical properties and structure of alpha-keratin fibres: wool, human hair and related fibres, Sydney, UNSW Press (1996) ISBN 0868403598

Did these cells ever have a nucleus containing DNA, which broke down perhaps ?

Thanks very much !

pkc
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Post by pkc » Wed Apr 04, 2012 7:11 am

Further,
What are the large dark spots shown in the following cross-section of a hair ?
http://en.wikipedia.org/wiki/File:Gray945.png

Darby
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Post by Darby » Thu Apr 05, 2012 4:46 pm

I think that you're right (I'm not positive), that with DNA amplification techniques, the small amount from a hair shaft can be used for analysis.

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