Punnett

You're shown two parent creatures with known genotypes for a trait. Predict the probability of each offspring outcome, effectively reading the punnett square, place your bet, then hatch the offspring to see if your ratios were right.

• Read both parents' genotypes for the trait in play
• Bet the probability of each possible offspring result
• Hatch to reveal the outcomes against your prediction
• Accurate odds score better

• Daily cross, the same parents for everyone today
• Practice, fresh crosses each round

• Desktop: click to set your bets on the betting panel, then hatch
• Phone & tablet: tap to place your bets and hatch

• Sketch the punnett square: each parent contributes one allele per offspring
• A heterozygous cross often gives the classic 3:1 dominant-to-recessive split
• Two heterozygous parents yield 1:2:1 across the genotypes, lean on those ratios

Punnett is a genetics game about inheritance, working allele crosses and the probabilities that decide which traits appear.

• Skills: genetics, inheritance, Punnett squares, probability, alleles
• Best for: roughly grades 7–12 (ages 12+)
• For parents & teachers: classic genetics problems made interactive.

Predicting offspring probabilities from two known genotypes is reading a Punnett square, the diagram Reginald C. Punnett devised in 1905.

Betting on the outcome before hatching is the original framing.

Betting is apt, because the square gives probabilities rather than results. A 3:1 ratio is what you expect across many crosses and not what any four offspring will show — a distinction that Mendel's own numbers, unusually clean for real data, have been argued about ever since.

Punnett is a genetics game about inheritance, allele crosses and probability. It's an original, free browser game made in-house for PlayPendium.

A free, original browser game on PlayPendium. No download, no install.