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Meiotic Nondisjunction & Aneuploidy Simulator

Watch a chromosome pair go through meiosis I and II in real 3D: dial in nondisjunction probability at each division and see exactly how trisomy and monosomy gametes are produced.

Genetics & Evolution3DModerate60 FPS📱 Mobile-adapted

Two homologous chromosome pairs are carried through a full, geometrically accurate meiosis — prophase condensation, metaphase I alignment, anaphase I homolog separation, cytokinesis, metaphase II alignment and anaphase II sister-chromatid separation — ending in four haploid gametes. Independent nondisjunction probabilities for meiosis I and meiosis II let you push the system toward producing trisomic (n+1) and monosomic (n−1) gametes on demand, while live readouts report each trial's exact chromosome count per gamete and the running aneuploidy rate across every trial you've run, so the abstract probability in the formula becomes something you can watch happen.

⚙ Under the hood

Watch two homologous chromosome pairs go through meiosis I and II in real 3D, dial in independent nondisjunction probabilities at each division, and see exactly how trisomic and monosomic gametes are produced.

geneticsmeiosischromosomesaneuploidybiologycell-division

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install