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Tip of the Month – August 2011

posted by DNA Identifiers @ 1:43 PM
Wednesday, August 3, 2011

Often times we are asked why we request the gender of the child on the Chain Of Custody (or submission) form, when DNA will tell us the gender.  The reason we ask for the gender is because it is a quality control check to ensure the correct individual was sampled.  There have been instances where samples were put into the incorrect envelopes during collection, and knowing the gender of the child has helped us to determine this error.  One example is a case with 2 children and an alleged father.  The COC documented child 1 as female and child 2 as male. When the DNA profiles were complete, they showed the opposite, child 1 was male and child 2 was female. One child was excluded while the other included.  Since we knew the children’s genders, we knew the samples had been switched at collection.  Without this information, the incorrect child would have been reported as an exclusion.

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