can anyone give me 2 examples in which DNA fingerprinting is useful?

Answer 1

the key is to
match a crime with a suspect's DNA. To do this, investigators have to do three things:

Collect DNA at the crime scene and from the suspect (see How CSI Works for more information)
Analyze the DNA to create a DNA profile
Compare the profiles to each other
Authorities can extract DNA from almost any tissue, including hair, fingernails, bones, teeth and bodily fluids. Sometimes, investigators have DNA evidence but no suspects. In that case, law enforcement officials can compare crime scene DNA to profiles stored in a database. The most commonly used database in the United States is called CODIS, which stands for Combined DNA Index System. CODIS is maintained by the FBI. By law, authorities in all 50 states must collect DNA samples from convicted sex offenders for inclusion in CODIS. Some states also require all convicted



Using DNA Evidence
Given the high profile DNA evidence had during the O.J. Simpson trial, most people know DNA profiles are used by criminal investigators to:

Prove guilt - Matching DNA profiles can link a suspect to a crime or crime scene.

Exonerate an innocent person - Innocent people have been freed from death row in the United States based on DNA evidence. So far, DNA evidence has been almost as useful in excluding suspects as in fingering and convicting them; about 30 percent of DNA profile comparisons done by the FBI result in excluding someone as a suspect.
DNA evidence is also useful beyond the criminal courtroom in:
Paternity testing and other cases where authorities need to prove whether or not individuals are related - One of the more infamous paternity cases of late revolved around a 1998 paper in the journal "Nature" that studied whether or not Thomas Jefferson, the third president of the United States, fathered children with one of his slaves.

Identification of John or Jane Does - Police investigators often face the unpleasant task of trying to identify a body or skeletal remains. DNA is a fairly resilient molecule, and samples can be easily extracted from hair or bone tissue; once a DNA profile has been created, it can be compared to samples from families of missing persons to see if a match can be made. The military even uses DNA profiles in place of the old-school dog tag. Each new recruit must provide blood and saliva samples, and the stored samples can subsequently be used as a positive ID for soldiers killed in the line of duty. Even without a DNA match to conclusively identify a body, a profile is useful because it can provide important clues about the victim, such as his or her sex and race.

Studying the evolution of human populations - Scientists are trying to use samples extracted from skeletons and from living people around the world to show how early human populations might have migrated across the globe and diversified into so many different races.

Studying inherited disorders - Scientist also study the DNA fingerprints of families with members who have inherited diseases like Alzheimer's Disease to try and ferret out chromosomal differences between those without the disease and who are have it, in the hopes that these changes might be linked to getting the disease.

Answer 2

Genetic fingerprinting is one of the applications of electrophoresis. in electrophoresis restriction endonucleases are used to 'cut' the organism's DNA into sections, they're then put into a well in a slab of agar gel. The gel and DNA are covered with buffer solution which conducts electricity. Electrodes connected supply an electrical field. The phosphate groups on the DNA are negatively charged causing DNA to move towards the anode. Smaller pieces of DNA move more quickly down the agar track, whereas larger ones are much slower, this leads to the formation of bands. These can then be compared to other samples for example at a crime scene if DNA is found it is compared to that of suspects' = genetic finger printing. Probably not that useful but there ya go lol

Answer 3

DNA fingerprinting is rapidly becoming the primary method for identifying and distinguishing among individual human beings.

An additional application of DNA fingerprint technology is the diagnosis of inherited disorders in adults, children, and unborn babies. The technology is so powerful that, for example, even the blood-stained clothing of Abraham Lincoln could be analyzed for evidence of a genetic disorder called Marfan's Syndrome.


check the site for more info
http://protist.biology.washington.edu/fingerprint/apps.html

Answer 4

DNA fingerprinting
A technique by which the DNA of an individual can be compared with that found in a sample or another individual. DNA fingerprinting is acepted by most courts as evidence for establishing paternity, and increasingly is being accepted as evidence in criminal trials.

Answer 5

Haha, she's asking about DNA testing like PCR tests, not fingerprints people.

They are used in court cases for crimes often, it's usually the most concrete evidence of a person commiting a crime.

DNA testing can also help finding out the parents of a child, say someone who has been adopted trying to find their parents, or used by a parent to figure out if their child is really theirs.

Answer 6

DNA fingerprinting is useful:

1. to catch bad guys (useful in criminal system)
2. to diagnose inherited disorder like sickle cell anemia (useful in health care)

Answer 7

First,dna could be on the sample tested,if they can find trace elements of tissue,ie;like skin,and if the sample has a trace of an element that is unknown to the source itself.

Answer 8

1. Crime Scenes
2. Finding out Genetic Disorders

Answer 9

every fingerprint is different and is an almost fool proof identification, the other one I dont know. oh yeah, fingers have loops, curves, and many other types of marking to distinguish them.

Answer 10

one can see features of one's thumb such as whorls arches and loops. Also you can check the pupil because everyone's pupils are different