Life, up close
Cross two parents on a Punnett square and watch the genetic ratios appear, or step inside a living cell and click each organelle to find out what it does.
← All Virtual LabsPunnett Square
Choose a trait and set each parent's genes, then read off the offspring. The grid shows every possible combination; the bars show the genotype and phenotype ratios.
Evolution — Natural Selection
The famous peppered moth. On pale, lichen-covered bark the light moths hide and the dark ones get eaten; on soot-darkened bark it flips. Choose the habitat and watch the population's colour shift, generation by generation — evolution by natural selection, in fast-forward.
Ecosystem — Predator & Prey
A meadow of rabbits and the foxes that hunt them. The two populations rise and fall in a never-ending chase — watch the foxes peak after the rabbits. Slide the rates and see the cycles speed up, settle, or crash to extinction. (Lotka–Volterra model with a carrying capacity.)
DNA Lab — Transcription & Translation
Type a DNA template strand (letters A, T, G, C). It is transcribed into mRNA by base-pairing, then the codons are translated into a chain of amino acids using the genetic code — exactly how your cells make proteins.
Cell Explorer
Click any organelle to learn its job. Switch between an animal cell and a plant cell to spot what's different — the cell wall, the big vacuole and the chloroplasts.