Which fingerprint pattern is characterized by ridges that have no deltas?

The fingerprint pattern characterized by ridges that have no deltas is indeed the arch. An arch pattern features a continuous flow of ridges that rise in the center, forming a wave-like appearance, without the presence of any triangular formations known as deltas. This is distinct from loops, which always have one delta, and whorls, which have at least two. The absence of deltas in an arch pattern makes it unique among fingerprint classifications. Understanding fingerprint patterns is crucial in forensic science, as it assists in the accurate identification and comparison of fingerprints in various investigations.