How Does DNA Testing Work?

How Does DNA Testing Work? | Cellmark

The decision to have a paternity test should not be taken lightly and you may have lots of questions. We urge you to consider all of the people involved and to decide whether this is the best course of action, particularly for any children in question.

How does DNA testing work?

It works by detecting certain parts, or “markers” in the DNA molecule that are known to vary greatly between unrelated people. Our tests compare the DNA at a number of these markers to determine if people are related.

The process is called Short Tandem Repeat (STR) profiling. STR profiling is a very sensitive DNA testing procedure that was originally developed for forensic analysis. DNA is extracted from the sample and a special enzyme is used to copy the genetic code at the relevant regions in the DNA. An STR profile is the result of several separate DNA tests.

If you require further information then please call one of our friendly, professional and confidential Customer Service advisors on 08000 362522, or send your question via email to info@cellmark.co.uk, or use our discrete SMS service.

What is DNA?
DNA (Deoxyribonucleic Acid) is the body’s genetic ‘blueprint’. It is a long thread-like molecule that carries the genetic code that determines our individual characteristics.

Taking a DNA sample
A simple guide showing how your DNA sample is collected

Results and Reports
What the test report may look like and what it might say.

Registering Online
Register a case with us, now, using our secure online service.