What is a partial DNA profile?
A partial DNA profile is a DNA result where only some of the expected genetic markers are detected.
This can occur when only a small amount of biological material is present, where DNA has degraded over time, or where the sample is complex or mixed with material from other individuals.
Because less genetic information is available, a partial profile is generally less discriminating than a full DNA profile. This means more people may be consistent with the result, and the interpretation may rely more heavily on statistical evaluation.
Partial DNA profiles are common in forensic casework, particularly where low-level DNA is detected, where items have been handled by multiple people, or where biological material has persisted over time.
Laboratory analysis may still produce findings from a partial profile, but these findings must be interpreted carefully. The presence of partial DNA does not indicate when it was deposited, how it arrived, or what activity led to its presence.
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