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Genex cannot guarantee that your forensic
sample will provide useful information. The success of the DNA
test depends upon the quality of the sample that you submit
to our laboratory. If the sample that you submit has a large
quantity of high quality DNA which is not degraded, the test
results can be just as conclusive as a swab or blood sample.
However, if the DNA in your sample is degraded, then the test
may not yield any useful information. The list below indicates
factors which may cause DNA to break down:
Moisture. DNA stores
best in the dried form. If you have a wet sample, such
as stains on a cloth, it is best to allow the cloth to
dry completely as soon as possible. If the forensic sample
remains damp or wet, there is a chance that fungal or
bacterial growth on the damp sample may break down the
DNA.
Time. DNA breaks down
over time. The sooner a forensic sample is submitted for
testing, the better. For instance, a sample which is only
a few days old has a much better chance of working than
a sample which is a few months old.
Exposure. Excess humidity,
heat, or freezing can break down DNA. If you will be submitting
a sample to Genex for testing, it is best to allow the
sample to dry (if it is damp). After the sample is dry,
store the sample in a clean paper envelope. Most samples
can be shipped directly to Genex at room temperature.
Contamination. Contamination
can affect the results of your test. When collecting and
handling your forensic sample, it is important to ensure
that you do not contaminate the sample with your own DNA
(always wash your hands or wear gloves, try not to touch
any stains directly with your fingers, do not cough or
sneeze on the sample).
