DNA fingerprinting is a test to identify and evaluate the genetic information-called DNA (deoxyribonucleic acid)-in a person’s cells. It is called a “fingerprint” because it is very unlikely that any two people would have exactly the same DNA information, in the same way that it is very unlikely that any two people would have exactly the same physical fingerprint. The test is used to determine whether a family relationship exists between two people, to identify organisms causing a disease, and to solve crimes.
Only a small sample of cells is needed for DNA fingerprinting. A drop of blood or the root of a hair contains enough DNA for testing. Semen, hair, or skin scrapings are often used in criminal investigations.
A person who has DNA fingerprinting done voluntarily usually provides a sample of blood taken from a vein. DNA testing also can be done on cells obtained by a simple mouthwash or a swab of the cheeks inside the mouth, but these methods are not recommended.
DNA fingerprinting is done to:
- Find out who a person’s parents or siblings are. This test also may be used to identify the parents of babies who were switched at birth.
- Solve crimes (forensic science). Blood, semen, skin, or other tissue left at the scene of a crime can be analyzed to help prove whether the suspect was or was not present at the crime scene.
- Identify a body. This is useful if the body is badly decomposed or if only body parts are available, such as following a natural disaster or a battle.
DNA testing at our facilities is a quick, painless process. With a simple buccal swab, we collect your DNA specimen from the cheek or mouth cavity, then properly label and package it for analysis. All our collection specialists are familiar with the steps of chain of custody necessary to ensure that DNA testing results are legally admissible.
Paternity or Maternity
A paternity test establishes genetic proof of whether or not a man is the biological father of an individual. A maternity test establishes whether or not a woman is the biological mother of an individual. We provide accurate, reliable paternity testing services to resolve legal and personal matters, if you need to solve the question of a child’s paternity. In a DNA paternity test, DNA samples are taken from the child and the alleged father (and the mother, if she’s available) and are prepared for lab testing. It is then tested with a battery of DNA markers, producing a genetic profile for each tested individual. The child’s profile is compared with the profiles of the mother and alleged father to confirm that he or she has inherited DNA from the alleged father.
Dizygotic, or fraternal, twins occur when two distinct eggs are each fertilized by a distinct sperm. In rare cases, dizygotic twins can even have separate fathers. Monozygotic twins, on the other hand result when one sperm fertilizes one egg, and that embryo splits into two. That means that monozygotic, or identical, twins always contain exactly the same genetic material or DNA, because their DNA came from the exact same gametes.
A twin zygosity test analyzes the DNA of each twin and checks whether or not they are the same. A simple DNA test can show conclusively whether or not a pair of twins are identical or fraternal. That knowledge carries implications beyond the satisfying of curiosity; identical twins are genetically more compatible with each other, meaning they are excellent candidates for all kinds of organ and tissue donations. At Fastest Labs, we conduct all DNA tests professionally, quickly, and accurately. That’s the Fastest Labs way.
A portion of the U.S. immigration process includes proving biological relationships. During the process of immigration, if the United States Citizenship and Immigration Services deems a birth certificate or other evidence insufficient, immigration DNA testing may be requested. FACTLabs follow the chain of custody procedures to enable the test results to be used for all government and judicial purposes.
FACTLabs strictly adheres to proper chain of custody procedures, making the test results legally admissible. A Judge has the final say on whether to include the results of a Legal Paternity Test in court.