PROCESS
There are two DNA testing methods currently being used. The most accurate method of DNA profiling, involving restriction fragment length polymorphism, or RFLP, requires extracting genetic material from small amounts of body tissue or fluid –
The updated DNA fingerprinting process, the Polymerase Chain Reaction (PCR) method, employs an enzyme that scientists can direct towards regions of the DNA that are known to contain variations. The enzyme then copies the region. When the process is repeated about 30 times – with the number doubling each time – more than a billion copies are produced. These can be projected onto a Nylon strip in the form of blue dots that delineate the genetic profiles of the segments. Unlike the RFLP method, the PCR system can be carried out in a matter of days. It can be performed on small amounts of DNA, and even on DNA that has begun to degrade.
- Blood
- Saliva
- Bone
- Skin
- Hair Follicle.
The updated DNA fingerprinting process, the Polymerase Chain Reaction (PCR) method, employs an enzyme that scientists can direct towards regions of the DNA that are known to contain variations. The enzyme then copies the region. When the process is repeated about 30 times – with the number doubling each time – more than a billion copies are produced. These can be projected onto a Nylon strip in the form of blue dots that delineate the genetic profiles of the segments. Unlike the RFLP method, the PCR system can be carried out in a matter of days. It can be performed on small amounts of DNA, and even on DNA that has begun to degrade.
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