DNA Testing: What is it?

You’ve no doubt been told that you’re unique many times throughout your life, but did you know that it’s genetically true? There is a very small probability (1 in 6 billion) that any two people on earth share the same genetic code, and the only way of determining the individual genetic code of a person, is through analysis of their DNA.  Identical twins will share the same genetic code.

DNA testing has come a long way since its inception in the late 1970’s, and today, people order and undertake DNA testing for a variety of reasons.

Some of the most common DNA tests include:

Paternity Tests – Paternity tests are the most commonly ordered of all DNA tests, and are used in a variety of cases where the biological father need to be proven. Modern DNA tests can confirm a man is the paternal father with more than 99.99% accuracy, and can exclude a man from paternity with 100% accuracy. The test compares the DNA of the child, with that of the potential father.

Relationship Tests – Another popular test, relationship tests provide information on the level of biological kinship that two people share. They are often used when a parent is not available to be tested, so a potential grandparent, or uncle/aunt is tested against the other person. Results will either confirm or exclude a familial relationship between two people.

Forensic Tests – Sometimes, a client will request a forensic DNA test be carried out, often to try and prove infidelity. Our laboratory technicians can analyse DNA from a variety of sources that you send in, including clothing with bodily fluids on it, hair samples (but only with roots attached), toothbrushes, ear swabs and nail clippings.