Part C: Choose the Genotype of the Parents You will use Punnett squares to predict the probability that two parents of your species will pass a particular trait to their offspring. Each parent has two alleles for a particular gene, one on each homologous chromosome. To prepare to make the Punnett squares, write down the genotypes of the parents for the three traits you’ll be predicting. Example: Mother: YyIRiPF Father: YyIWiPF