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Biology
Natural selection across generations
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Habitat and population
Restoring the simulation…
Changing modes starts a new experiment.
Changes appear in newborn offspring, not in existing individuals.
Changing the seed restarts the experiment with another random sequence.
- Total bunnies
- —
- Generation
- —
- White fur
- — · 0%
- Brown fur
- — · 0%
Pin before changing the environment or selection pressures.
No conditions changed yet.
The environment affects survival of phenotypes. Individuals do not change their genes to adapt. In this model, floppy ears provide no survival advantage.
Model notes
- The model represents Mendelian inheritance, reproduction, mutation and selection in an idealized rabbit population. The drawings do not measure real animal size or movement speed.
- Bunnies live for at most 5 generations. Each pair normally has 4 offspring; some recessive-mutation cases produce 5. The two pedigree positions identify parental alleles; model bunnies have no sex.
- Mutations are scheduled in new offspring. The environment does not change genes in living individuals. Wolves and food apply selection at scheduled times, independently of visual collisions. Floppy ears confer no survival advantage in this model.
- The population threshold is 750, checked after reproduction, so the final population can exceed 750. The clock stops at 1,000 generations. This is not a forecast of real rabbit populations.
- Pedigrees show retained relationships only. Changing mode or seed starts a new experiment; the same seed and actions reproduce the same outcome. Reopening pauses the simulation so observation can continue.