Typical scenarios within this site’s subject: questions to ask, materials to prepare and points that can be examined.
Typical scenarios
A sample number differs between the collection record and report
Suppose a biological sample has one number in the collection record and another in an appendix to a DNA report. A participant suspects substitution, but the documents contain no explanation of the laboratory’s internal identifier.
Two relatives are proposed in place of an unavailable parent
If an alleged parent is unavailable and the family proposes two relatives instead, preparation should begin with a family relationship diagram. The number of participants alone does not identify the hypothesis that can be tested. Confirmed relationships, assumptions and alternative explanations need to be distinguished before discussing the laboratory study.