A Punnett square is a visual representation of Mendelian inheritance used to determine the probability of genotypes in a particular cross.
Unlike Pedigree charts which shows observable phenotypes, Punnett squares show the genotype probabilities.
| A | a | |
|---|---|---|
| A | AA | Aa |
| a | Aa | aa |
For example, in the Punnet square above, there is a quarter chance to get AA, a half change to get Aa, and a quarter chance to get aa.