2006-10-31 06:48:08 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Biology
If a sample of DNA can be found, the sample could be linked to a suspect hence, used can be used for evidence and find suspects.
That's a really good question. Wow, that made me think! Thanks.
:) :) :)
2006-10-31 07:14:21 · answer #1 · answered by lemon drops 3 · 2⤊ 0⤋
The important thing to keep in mind is that on it's own, DNA finger printing proves 1 thing and 1 thing only: that a sample from a known person either matches or doesn't match a sample from a crime scene.
That can demonstrate that they are not from the same person. It can strongly suggest that they are the same person. But since it is theoretically possible for two different samples to give the same result, it cannot 100% prove that both samples came from the same person. It's basically outside the realm of reason that the samples came from two different people, but it's a nice touch to demonstrate you knowledge of the technology if you include that detail.
The DNA / DNA test really doesn't solve the crime. It's one facet of the overall investigation, but as has happened in the past, if a jury can be convinced that the sample from the crime scene has been tampered with or is illegitimate, it may not even end up helping to convict someone.
However, DNA can be used to overturn convictions, if say a semen sample from a sexual assault doesn't match the DNA from a suspect/convict.
There are a couple of different techniques for actually doing the test, in general they are based on the presence of repeated sequences in the DNA and the resulting banding pattern produced after gel electrophoresis.
2006-10-31 08:07:38 · answer #2 · answered by John V 4 · 0⤊ 0⤋
Each individual has a unique DNA obtained from special combination of DNA molecules from his parents.
So when we manipulate DNA from certain person with enzymes called restriction enzymes and load it into electrophoresis apparatus through electrical current it will migrate in the gel and give a unique bands pattern that is special for each individual.
When police investigators fine tissue samples at the crime sense( blood, hair, etc) they isolate DNA from these samples and compare it with DNA samples from the victim and the suspects, if DNA migration pattern from the sample found at the crime sense match with a DNA sample from the suspect ................. The crime solved
2006-10-31 07:56:10 · answer #3 · answered by saleh_11j 2 · 0⤊ 0⤋
DNA can be used to solve crimes through DNA fingerprinting. This involves gel electrophoresis mechanism , by which specific bands are obtained , some of which are dark and some are light .
By determining the evidences present near crime area such as hair, blood ,we can identify the right criminal.
2006-10-31 07:18:34 · answer #4 · answered by Sharada B 3 · 0⤊ 0⤋
dna gel electrophoresis
which is like dna fingerprinting
2006-10-31 06:53:49 · answer #5 · answered by Anonymous · 1⤊ 0⤋
By demonstrating that the suspect was at the scene of the crime.
2006-10-31 06:50:50 · answer #6 · answered by Anonymous · 2⤊ 0⤋
becasue nobody has the sdame DNA it makes it that much easier to find whoever their looking for
2006-10-31 07:21:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋