Redrawn to match the reference aesthetic: thick ribbon strands with clustered rungs per half-turn that vary in length (longer at the wide point of each arc, shorter near crossings). Original geometry — cubic Beziers and straight lines, no tracing.
Copyright: Original SVG built from cubic Beziers + straight lines. The generic concept of a DNA double helix with rungs is not copyrightable; only specific artistic renderings are. No tracing or geometric transfer from any reference image — different proportions, different Bezier control points, different rung count per cluster.