Describe how an organism has 2 sets of dna and the importance of homologous chromosomes

Most organisms are Diploid, and as a result, they will have received 2 copies of the chromosomes, or sets of chromosomes, from both their parents. This they will have 2 sets of Genes that will perform almost exact same process, except with different phenotypes.

These chromosomes need to be homologous, in order for new alleles and other genetic combinations to be made.