Punnett Square – Mendelian Genetics (One and Two Trait Pairs)

Integrated ScienceGenetics & EvolutionAges 14–15

Choose the genotypes of the parents (P) with one or two gene pairs (pea plants: yellow/green seeds, round/wrinkled; purple/white flowers, tall/short stem). The Punnett square automatically builds the gametes and their combinations; tap a cell to see its genotype and phenotype. Click Simulate N offspring to run a random simulation and compare the experimental ratio with the theoretical 3:1 or 9:3:3:1 ratio on a bar chart.