The article I read was published in 2006 not long after “the draft sequence of the chimp genome was published.” The genome is the complete set of DNA. It showed that Humans have a loss of genes when compared to Chimps. The difference between Chimps and humans is only 1.23 %. But this is enough “to create a bipedal, big-brained primate lineage” Usually a loss would be detrimental. However, in this case it seems that less has turned out to be more. Scientists hypothesized that “when mutations render functional genes inactive in a process called pseudogenization—can also confer selective advantage and promote evolutionary change.” In the research, they focused on pseudogenes that might “play a role in immune response”. This is what they found.
