Well, the Punnett square tells us the potential genotypes of that offspring in any given mating process, in any given crossing process. So to see what a punitive square actually looks like let's take a look at the following cross let's suppose we have one parent that is homozygous dominant and the other parent is homozygous recessive so we're mating these two individuals or these two plants or these two organisms in the following way. Now, before they actually mate, what must take place? Well, they have to produce gametes and gametes are sex cells. So let's suppose this is the male parent. They have to produce the sperm cells.