Home▸Genetics & Evolution▸Speciation Snowball 2D: Hybrid Incompatibility Simulator

Speciation Snowball 2D: Hybrid Incompatibility Simulator

Interactive 2D Dobzhansky-Muller model: two populations diverge locus by locus after a founder split, and every derived-allele pairing that was never tested by selection can become a hybrid incompatibility -- watch the incompatibility matrix fill in and reproductive isolation snowball across a live fitness-over-time chart.

Genetics & Evolution2DAdvanced60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategoryGenetics & Evolution

RenderingCanvas 2D

DifficultyAdvanced

Target FPS60

ControlsPlay/Pause toggles generational divergence, a divergence-rate slider sets how fast each lineage fixes new alleles, an incompatibility-density slider regenerates the hidden epistatic interaction matrix, a cost-per-incompatibility slider tunes the fitness penalty per clash, a genome-length slider resizes the incompatibility matrix, a clock-speed slider scales simulation speed, a matrix-labels toggle shows/hides realized-cell values, and a New Founder Split button restarts the divergence clock from generation zero; the hybrid-cloud panel supports drag-to-pan and scroll-to-zoom.

evolutionspeciationpopulation-geneticsreproductive-isolationgeneticshybrid-fitness

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Two founder populations evolve apart, each independently fixing new "derived" alleles across a shared set of genetic loci. Because selection inside one lineage never gets to test its new alleles against the other lineage's, pairs of derived alleles can be secretly incompatible -- a hidden interaction matrix marks which pairs would clash if ever brought together in a hybrid. This 2D dashboard lays the whole mechanism out at once: genome bars for each lineage, a live incompatibility-matrix heatmap, a fitness-over-time chart that traces the snowball curve, and a pannable F1 hybrid cloud whose colour and size track hybrid fitness in real time.

⚙ Under the hood

evolutionspeciationpopulation-geneticsreproductive-isolationgeneticshybrid-fitness

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install