← All virtual labsMR. ALEXANDER’S CLASS · INTERACTIVE SCIENCE

Camouflage & Survival

Inspect individual beetles. Follow survival, inheritance, and population change.

Model time: 0

Click a beetle to inspect it · Pause to examine a moment · Advance one step completes one generation

Model paused. Choose settings, then press Play.

Evidence notebook

Snapshots and notes save in this browser on this device. Running model state resets on reload. Export before using a shared device.

How this model works · Assumptions and limitations

Asexual population of 60 beetles, initially 20 of each color. Each generation includes predation, then offspring sampled from survivors; each offspring inherits one parent’s color. Moderate pressure: matching color survives with probability 0.85, others 0.45. High: 0.65 and 0.15. No predators: all survive. These are illustrative rules, not measured rates. Reproduction restores 60 offspring if any survive. Random sampling can change frequencies even without predators. No mutation or migration; lost colors cannot return. Individual beetles never change inherited color.

Science background · OpenStax Biology 2e

Record snapshots and use the evidence notebook to explain your results.