For discussing the functions of different structures of all organisms.
Is it really possible to use hair for things such as paternity tests, identification of the culprit a crime scence, etc? As far as I'm concerned hair is composed of proteins not cells, how can they extract DNA from it? Is it perhaps from the part that was connected to the hair follicle?
Yes, i believe the bottom of the hair folicule is made out of living cells. That is why hair grows
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
The hair folicule which is in the base of hair, contains live cells (therefore, these cells has DNA). For using it in analysis of DNA (paternity tests, crime investigations, etc), the hair must be uprooted. The hair which falls as breakage isn't usefull for these analysis (it doesn't contains DNA).
It's not possible. keratine has the same structure for every person. But the hair folicle contains live cells at it's root that do contain DNA. By PCR-ing this DNA we can find out the person's identity
do you also know what DNA they are examining in a paternity test/crimes and so on ? coding DNA or non coding DNA
No idea... Do you know? Please share...
Yeah, i know
--> it's the non coding region of the DNA and they check for so called VNTR --> variable number of tandem repeats. These are repeats of a specific DNA-sequence that is repeated after each other
--> by taking 10 different VNTR you'll get a good identification method.
You can amplify the VNTR with PCR and than analyse on a gel, which yields to band pattern seen on television.
Thanks for the info.
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