Showing posts with label DNA Technology. Show all posts
Showing posts with label DNA Technology. Show all posts

Tuesday, March 1, 2011

DNA Test To Determine The Legal Rights

DNA testing is becoming increasingly important in both civil and criminal legal circles. In the field of private law, it is often important to be able to determine family relationships for financial reasons or to enforce a number of other obligations. Due to the effectiveness of DNA testing to determine where such relationships might arise, they are becoming much more widely used in determining family relationships as proof in both civil and criminal trials.

DNA Testing - Uses in Inheritance Issues

In the law of inheritance, even if the deceased left a will, it is often important to know what kind of family relationship exists. In most jurisdictions, the children of the deceased are automatically entitled to a share of the property, so this can often lead to disputes as to who is and is not a child of the testator. Using DNA samples from the testator and the alleged contraventions child or children, it is possible to confirm whether such a relationship actually exists, which allows courts to decree for clarification on the actual circumstances of a particular case. From here, bequests to each child's name can be completed, thanks to the cessation of activity by the results of DNA testing.

DNA testing - Determination of alimony Disclaimer

In family law, there is often required to feed the children until they reach adulthood. Again, this can give rise to complaints from parents or otherwise, which may require positive DNA testing to determine the true facts. Depending on the outcome, if the subject is the father of the child in question will determine whether or not it can be processed by digestive payments, therefore, DNA testing plays an all important role in this type of judicial decision-making.

DNA Testing - DNA Data Base and Criminal Identification

Even in matters of justice and policing, maintenance of DNA samples for identification purposes is becoming increasingly common worldwide, with a wide construction DNA database underway. The idea behind this is to use DNA testing to provide a better resource against which potential repeat offenders can be identified. Ethics aside, this will no doubt prove an important tool in the fight against crime, and no doubt the authorities broader powers to search suspects.

Also, in the circumstances of the criminal law, where a suspect allegedly killed a victim. Trace analysis of blood or hair of the head can be used to determine beyond a reasonable doubt that the defendant was present at the scene or involved in some connection with the death of the victim. Moreover, the DNA found at the scene of a robbery may be sufficient to point to a positive identification of the accused, along with supporting witness testimony to corroborate.

DNA testing - for Immigration

Immigration law relies heavily on DNA testing and the results of DNA tests to prove or establish family relationships may exist, which can be used to determine the processing of immigration applications. Without DNA testing facilities, the process of establishing true family relationships in immigration would be much more detailed, more prone to possible errors and therefore less efficient. However, through a paternity test or kinship, it is now possible to identify relatives and process visa applications in the shortest time.

So DNA testing has been relevant in a growing number of legal areas and, as science continues to develop, the use of DNA evidence is expected to increase.

Monday, February 28, 2011

Top 5 Famous DNA Tests

DNA tests are not usually the major media about the media world, but that does not mean they are not important or high profile cases of DNA evidence to report. In fact, over the past few decades DNA testing has played an increasing role in the way of analyzing the past and how we interpret our future. Whether the determation of paternity through DNA tests for paternity or in establishing wider links of DNA, and forensic DNA cases, our top 5 DNA tests reveal how relevant famous DNA testing really is.

1. James Brown - The 'Godfather of Soul' James Brown was named the subject of one of the highest profile cases of DNA testing in recent history. The trial examined whether children alleged the musician was actually fathered by him, and a series of independent tests for paternity DNA were processed in order to establish paternity. Test of 12 submitted, only two have returned to be positively identified as descendants of Brown - one of whom is now a woman of 45 years.

2. Eddie Murphy - Modern comedy legend Eddie Murphy was involved in a high profile case for DNA testing in particular caught the attention of the media and full of bright column inches. His trial was to establish the paternity of the daughter of Melanie Brown (aka Mel B) of Spice Girls fame during a separation process. Was determined after harvest and processing of samples from the child, the mother and alleged father, Eddie Murphy was indeed the father of the son of his ex-partner.

3. Anna Nicole Smith - TV personality and model Anna Nicole Smith was pushed to the forefront of media scrutiny if the evidence of high-profile celebrities of DNA, where it was the paternity of her daughter to the question. Initially, the partner of Howard K. Stern was nominated as the likely father on national television, prompting the media storm surrounding the testing process - although the methods of DNA paternity test proved to be ex-husband Larry Birkhead as the biological father of the child.

4. Marie Antoinette - Queen and icon of French history, Marie Antoinette was recently the subject of DNA testing and advanced sampling techniques. DNA from hair is supposed to have been to Antoinette was collected and tested with DNA obtained from the heart of Louis XVII. Thanks to advances in processing technologies of DNA, the samples were able to match to determine that indeed a genetic link between DNA samples, confirming the identity of the hair.

5. Thomas Jefferson - Thomas Jefferson was the third President of the United States of America, and is widely regarded as one of the main founders of the modern constitution. However, his image has been somewhat tarnished by allegations of origin for over 200 years who had children with his slave Sally Hemmings. After DNA samples were recovered from the relevant parties, determined that the child alleged Eston Hemmings was in the sharing of genetic material on the male side with Thomas Jefferson, although no firm conclusions were drawn as to whether this subject was with Jefferson personally.

In conclusion, it is clear to see in the above examples, the power of DNA testing and the role it has and will continue in our lives.

Sunday, February 27, 2011

Reasons For DNA Testing

DNA testing is becoming more and more popular as a way of catching criminals and establishing family relationships. But why is that DNA testing is particularly favored by blood tests and other methods of detecting parentage and what are the most significant reasons for its current use in both medical and legal circles?

1. DNA is unique to the individual concerned

Good to know that we are all unique. Our DNA is completely different from any other person anywhere in the world. It's like our own individual serial number - while we may share certain digits with others, which are essentially unique in the makeup of our DNA. What this means is that DNA testing is an important tool to identify genetic relationships, because when we share a number of DNA matches with someone who is accused of being a relative, who is usually very safe to assume that there is a genetic link . Moreover, this also helps to support DNA testing for legal purposes, where it is possible to use DNA as a strong measure to support alleged guilt in serious crimes such as murder and sexual assault.

2. DNA testing is easy to prove

DNA samples can be obtained very easily, making it ideal for testing young children. A buccal swab of saliva or hair of the head may be sufficient to provide the DNA necessary for a paternity test in order to establish a biological relationship between the alleged father and child. Instead of having to test blood types or other forms of identification of family relationships, the DNA samples are quick and easy to take of any age and pose no threat to the donor of the sample.

3. With great detail to facilitate comparison

Due to the complex nature of DNA, it is possible to use genetic data match as a highly compelling set of genetic inheritance. Add to this the fact that there is new alleles may be introduced that are not present in the parent or alleged, and it becomes immediately clear whether there is a paternal relationship in place.

4. Allows DNA testing of more distant relatives to determine paternity

DNA testing, frequently used in cases of paternity disputes, can be carried out without the need for a DNA sample from the father. What this means is that, in fact, the father is not necessary to provide a DNA sample which is not available or unwilling to cooperate. Taking the DNA of close family members related to the alleged father may be possible through DNA testing to determine if a relationship does exist.

5. DNA testing is cost effective and relatively fast

DNA testing is becoming more accessible to people worldwide. As competition increases and technology improves, the price of DNA tests have fallen drastically in recent years. This is compounded by the fact that it is fast and relatively stress-free to collect DNA samples and send to the laboratory and the results can be obtained relatively quickly, in just 48 hours.

As we have seen a number of advantages of DNA testing and paternity test which resulted in an increase in demand for this type of testing worldwide.

Thursday, February 24, 2011

DNA Testing for Forensic Purposes

One of the major advances in forensic science has been the use of DNA evidence. This test method has helped solve many crimes would not have been possible decades ago. More important, he has been able to solve crimes with a high degree of precision that results in the avoidance of other insightful or questionable methods of research.

Every human being on earth has genes. These genes are a unit of heredity and is unique for each person. They are made of composites of a number of molecules of DNA (deoxyribonucleic acid) in a particular sequence that is unique to each person. Thus, a person's genes can be identified and mapped. This is known as DNA analysis.

In the forensic science of DNA from biological samples such as human hair, blood, semen, skin or saliva found at the crime scene is compared with the DNA of the suspect and the comparison can be found if the person suspect is innocent or guilty. This process is called genetic fingerprinting or DNA. The system of DNA profiles usually specify whether the samples at the crime scene is not contaminated, although the technology is developed DNA extraction capabilities have improved greatly.

The first person to be sentenced to life in the UK on the database of DNA profiles was a rapist and murderer by the name of Colin Pitchfork. In the years 1983 and 1986, the bodies of two young teenagers were found. These girls had been raped and strangled in a small town of Narborough, when each of the girls was to go home alone at the end of the day. There were no witnesses to the crime, but DNA profiles of samples taken from the scene of two murders confirmed that the crime was perpetrated by the same person. The investigations led to the arrest of Richard Buckland, a young boy who confessed to killing the girl in second and denied he had anything to do with the murder of the first child. The DNA profile of Richard Buckland did not match DNA samples taken at the scene of two murders. Subsequent investigations led to the arrest of Colin Pitchfork in September 1987. The DNA profile of the blood sample from Colin match the DNA profile of the murderer of two girls. Colin Pitchfork confessed and was sentenced to life imprisonment in 1988 and became the first person to be convicted on evidence obtained from DNA profiles. Richard Buckland was the first person to prove his innocence of the alleged crimes that DNA profiles.

DNA testing can be performed on samples of various materials obtained from the crime scene. The standard samples can be blood stains from clothing, tissues and tampons, clothing such as hats, scarves, underwear, cigarette butts, gum, hair (at least four or five hairs with roots hair), post-mortem tissues. Reference samples were obtained from buccal swabs (swabs of saliva taken from the cheek inside the mouth), blood, semen or sperm, or umbilical cord dry. Success rates vary depending on the samples and conditions that are in preservation methods also vary from samples kept in dry ice to tubes simple paper envelope.
National DNA Index (NDIS) has thousands of records of DNA profiles from samples taken at the crime scene and DNA profiles and samples of bodily fluids provided by known criminals. These data have been used to relate and solve crimes and has resulted in more than seventy thousand convictions. The NDIS and departments DNAAU-II have helped in the search for missing persons and also in the identification of unidentified bodies.

forensic investigations based on DNA analysis have come a long way since the early studies were conducted during the 1980's. Paternity tests can confirm that the alleged father is a father with a hundred percent accurate and can conclude that the alleged father is the father with 99% accuracy. The results are accurate, even when the mother is not tested. Infidelity or ancestry can also be followed on the basis of DNA profiles.

A lot of innocent victims are released after DNA profiles showed that they were not related to the crime. As a test methodologies are more refined, Forensic DNA testing will cement itself as an important tool in the investigation of crime.

Wednesday, February 23, 2011

Description of DNA Technology

Undoubtedly, DNA technology has revolutionized the world of science. Scientific fields of biochemistry, genetics, biology and forensic medicine, even changed by the use of this powerful technology. Deoxyribonucleic acid, known as DNA is the genetic material of an organism. This technology has solved many mysteries behind evolution, disease and even human behavior.

DNA technology is also widely used to verify biological relationships and the identity of persons living or dead. Major advances in DNA analysis have allowed DNA tests to be completed shortly.

There are many technologies used in DNA testing. The most common of which are electrophoresis, short tandem repeats (STRs), Chain Reaction (PCR), sequencing of mitochondrial DNA Restrictive Fragment Length Polymorphism or RFLP. A brief description of each technology is provided below.

Electrophoresis is a technique in separating DNA fragments by size through the introduction of an electric field in the DNA molecule. The DNA molecule is in a viscous medium, known as the gel. longer molecules and smaller separate due to their different abilities to pass through the gel.

Short tandem repeats (STR) is a type of DNA analysis conducted to examine specific areas in the DNA. All people have differences in certain regions of DNA. These differences are used to determine the identity of an individual.

Polymerase Chain Reaction (PCR) is a technique used to create exact replicas of DNA. Millions of repetitions are created allowing DNA testing to be performed on samples that are too small, like a pair of skin cells. The sample, although it should not be contaminated by DNA from another source.

The sequencing of mitochondrial DNA. There are two types of cells in DNA - nuclear DNA and mitochondrial DNA. There are cases where a sample is too old and no longer has nuclear DNA. MtDNA sequencing is a technique used to recover the mitochondrial DNA. Forensic uses of this technology on cases that are still unsettled after so many years.

Restrictive Fragment Length Polymorphism (RFLP) DNA technology is one of the first technologies used in DNA testing and is no longer widely used. RFLP analysis of different lengths of DNA fragments from the digestion of a sample with a restriction endonuclease enzyme.