In a monohybrid cross, how do the events of meiosis explain mendel's first law?

In a monohybrid cross, how do the events of meiosis explain Mendel's first law? ... During Meiosis 1, the different alleles of a gene segregate as homologous chromosomes separate during Meiosis 1 and each daughter cell (gametes) receives one homologous chromosome, and therefore one allele of the gene.