Detention Academy Practice Exam 2026 - Free Detention Academy Practice Questions and Study Guide

Minutia are the small, precise ridge-structure details used to compare fingerprints. The classic minutiae include ridge endings (where a ridge ends), bifurcations (where a ridge splits into two), and islands or dots (small isolated ridge segments). Serpentine describes a curved ridge path, but it is not a discrete, locatable feature that examiners treat as a separate minutia. Since minutiae are defined as specific points that can be mapped and compared, serpentine isn’t used as a separate minutia for matching. So among the options, serpentine is the one that is not a minutia.