Drakery

Forecast the outcome of a breeding cross on the Punnett square, then drop down to the codon level and rewrite the gene to produce the trait you want.

How to play

Each round pairs two layers of genetics. First you predict the ratios of a Mendelian cross by filling in counts for each genotype or phenotype. Then you work at the molecular level, editing the DNA codons of a gene until its translated trait matches the target.

• Read the parent genotypes and enter your predicted counts for the Punnett-square outcomes.
• Lock in your Mendelian answer to check it against the true ratios.
• Edit the live codons of the gene, base by base, to change which trait it encodes.
• Hit the target trait to complete the molecular half of the round.

Controls

• Desktop: click and type to set Punnett counts and edit codon bases; use Hint if stuck.
• Phone & tablet: tap fields to enter counts and tap to edit codons — fully touch-friendly.

Tips & strategy

• For a standard two-allele cross, the classic 1:2:1 genotype and 3:1 phenotype ratios are your starting point.
• When editing codons, remember several codons can map to the same amino acid — a silent change won't alter the trait.
• A single base swap can be missense, silent or nonsense; check what the new codon translates to before committing.

What you'll learn

Drakery connects inheritance patterns to the molecular code beneath them, from Punnett squares to real codons.

• Skills: genetics, inheritance, molecular biology, Punnett squares
• Best for: roughly grades 9–12 (ages 14+)
• For parents & teachers: genetics down to the molecular code.

About Drakery

Drakery connects inheritance patterns to the molecular code beneath them, from Punnett squares to real codon-to-amino-acid translation. It's an original, free browser game with daily and practice rounds.

A free, original browser game on PlayPendium — no download, no install. Browse all games →