Extended DNA Studies Our standard DNA tests analyse 16 genetic locations – this is the GOLD standard for these tests. However, it is possible that in certain scenarios an inconclusive result may be given. In these unusual circumstances,
extended DNA studies may be needed. What are extended DNA studies?
Extended DNA studies analyse a further 4 genetic locations. So the result will then be based on 20 genetic locations instead of 16. This vastly increases statistical strength. Examples of scenarios where extended DNA studies may be required: - Paternity Analysis – The two
alleged fathers in a case are full brothers. If only ONE alleged father is tested and the analysis demonstrates ONE mismatch in the sixteen, a further study will be required to establish whether this mismatch is due to natural mutation or because the other brother is the true biological father. The same applies to potential mothers in a Maternity test if they are full biological sisters.
- Sibling/Grandparent
Analysis – As explained above, the fewer test participants, the more likely these tests will yield inconclusive results. It is still a relatively rare occurrence but to achieve the most definitive answer possible in certain circumstances e.g. half Sibling test with no known parent, extended DNA studies are recommended.
Options and cost
The cost of the extended study includes the first three people in a test. Further individuals are charged at the additional person’s rate.
When considering extended DNA studies, you have two options: - Proceed with the standard test and see what the initial result is. (After all, it may be fine.)
- Order the extended study straight away to avoid the delays caused by retesting.
Please Note: The original DNA samples stored in the
laboratories will be used for the extended study. There will be no need for Clients to revisit the clinic for re-swabs. To discuss extended DNA studies please contact us.
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