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A Punnett square is a visual diagram to predict offspring genotype combinations from known parental genotypes. Created by Reginald Punnett around 1905.

Guide étape par étape

  1. 1Write one parent's gametes across the top, the other's down the side
  2. 2Fill each cell by combining corresponding alleles
  3. 3Count genotype frequencies from the completed grid

Exemples résolus

Entrée
Aa × Aa
Résultat
AA, Aa, Aa, aa → 1:2:1 genotype · 3:1 phenotype
4 cells; AA=1, Aa=2, aa=1

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Paramètres