# Inheritance evidence-chain diagram

Original scientific explanatory diagram; prepared outside the Site for review.

Files: `evidence-chain.svg` (vector with accessible title/description and real text), `evidence-chain.png` (1152 × 2400), and `generate.py` (reproducible Matplotlib source).

Run `python generate.py` in this directory with Matplotlib installed. No external images, datasets or network requests are used.

The four boxes identify distinct observations, not demonstrated stages of a biological mechanism. Every dashed arrow is explicitly a proposed link requiring evidence. Shared environment, learning and existing genetic differences remain alternative explanations. “Outcome in descendants” names an observation to distinguish, without presupposing biological inheritance; similarity in later generations alone does not identify its cause. The diagram offers no biological procedure, intervention, clinical guidance or experimental result.

Editorial basis: explaining how to evaluate proposed inheritance mechanisms. The diagram is an original conceptual synthesis, not a reproduction of another figure or a claim that source biology is established.

Verification: generated successfully; SVG parsed as XML and given role/title/description. PNG visually inspected at full diagram scale: labels are within boxes, arrows and labels separated, no clipped text. Vertical single-column layout avoids horizontal reading order. Root should inspect at intended rendered width before publication; this is not a browser accessibility audit.

Suggested alt text: Four separate observations—environmental input, individual response, cellular change and outcome in descendants—connected by dashed links that require evidence. Shared environment, learning and genetic differences are alternative explanations.