How do punnett squares relate to meiosis?

The square shows the possible alleles and how they can be expressed when they come together once again.
It is used In genetics and is a type of grid used to show the gametes (sex cells) of each parent and their possible offspring. Sometimes it is explained as a type of grid that can indicate all the possible outcomes of a genetic cross.
It is named after Reginald Crundall Punnett, an English geneticist.