Thus, if two pairs of chromosomes are segregating in meiosis and if each pair contains heterozygous genes, then four different haploid gametes will arise. In the lower diagram at the right, every possible combination between the two sets of chromosomes has been accounted for. For a brief consideration of the numerical relationships that exist between the pairs of segregating alleles and the resultant gametes, genotypes and phenotypes they produce, flip to the next card.