Potatoes are superior :P

To be a little more accurate, all primates have 48, but somewhere along the line, the homo genus ancestral line had a species where gene #2 became fusion of a pair of genes that exist separately in other primate lines. Therefore, we have 23 genes (46 chromosomes), whereas other primates have 24 genes (48 chromosomes). Other than that fused gene, human and other primate DNA are around 98% the same, and had that not happened, we would have had 48 as well