DNA profiling?

Question

what's the definition? and i wanna know what are the methods, dissadvantage and advantages of DNA profiling?
Thx... will appreciate ur answer ASAP!

Answer 1

See the site blow. Also do a search, there are loads of info sites around.

Answer 2

A very simple way to look at it is that a complete set of DNA (genes) is a bluprint for creation of a human body and every tissue cell has a complete set of DNA. A relatively short sequence in the DNA specifies the plans for a particular human trait (such as eye color) and all humans share similar traits. Scientists can cut out of the DNA any specific sequence (or trait) but the sequence has excess DNA not needed for the trait and that varies a great deal from person to person. Think of the sequence as a train consisting of an engine and blue boxcars needed for the trait mixed with numerous red boxcars that are not needed and will be ignored when the trasit is created. No two people (except identical twins) has the same number, locations and lengths of useless red boxcars and the lengths of their trains differ as a result. When the trains (sequences) are placed in a gel subjected to an electrical force they begin to roll but the distance traveled in a given amount of time will depend on the length (sluggishness) of the train. By checking several sequences from different DNA samples, the pattern of progress of the trains will differ for different donors and can be used to identify whether the samples are from the same donor or different donors. One sample may be taken from a crime scene and the other from the suspect to help prove guilt or innocense. One problem with crime scene DNA samples is that bacteria may alter or destroy the DNA preventing a good test. However, DNA from certain tissues may remain intact for centuries under favorable conditions. The mitochondria in human cells have their own DNA sequences which are passed unchanged only from mothers (eggs) to offspring and that has often been used to help identify (the remains of?) relatives with the same mothers or grandmothers such as siblings or cousins, etc.

Answer 3

DNA matching is to look at "genes" ,, but because you can't know an exon when we look at it ,, DNA matching is looking at codons (protein equivalents) ,, or exons (actual working genes) where we can ,, and find that the dolphin is very close to the elephant.

DNA profiling is forensics ,, and looks at "genetic rubbish" that makes the individual unique. To know who is the father or mother , we also look at the "rubbish" ,, and that too is very evenly mixed and predictibly individual.

Species profiling is gene matching ,, looking at the codons and exons.

Tracing the family line for human is looking at the "genetic rubbish".

Our genome is 80 to 95% rubbish that has no use ,, and constitute the genetic load.