R
rossum
Guest
Two points here. First, you source supports " the evolution of humans and chimpanzees." from earlier hominids. Thank you for conceding that point.… the low effective population sizes of hominids. This has resulted in the accumulation of a large number of deleterious mutations in sequences containing gene control elements and hence a widespread degradation of the genome during the evolution of humans and chimpanzees.
Second, this and other studies on genome decay are often in cases with “low effective population sizes”. Because the pool is small, even a single error is a larger proportion of the pool than in a large pool. With a population of 10,000, each single error affects a higher percentage of the population than if the population were 7,000,000,000. With the larger population there is a larger buffer of unmutated copies to spread through the population.
This is a known problem with small inbred populations, such as the Amish, or various near-extinct species. If a deleterious mutation appears it can quickly spread to a relatively large proportion of the population. That is much less of a problem with large populations.
rossum