@Numpty,
The use of percentages obscures the magnitude of the differences. For example, 1.23% of the differences are single base pair substitutions. This doesn?t sound like much until you realize that it represents ~35 million mutations! But that is only the beginning, because there are ~40?45 million bases present in humans and missing from chimps, as well as about the same number present in chimps that is absent from man. These extra DNA nucleotides are called ?insertions? or ?deletions? because they are thought to have been added in or lost from the sequence. This puts the total number of DNA differences at about 125 million. However, since the insertions can be more than one nucleotide long, there are about 40 million separate mutation events that would separate the two species.
Comparison between a base substitution and an insertion/deletion. Two DNA sequences can be compared. If there is a difference in the nucleotides (an A instead of a G) this is a substitution. In contrast, if there is a nucleotide base which is missing it is considered an insertion/deletion. It is assumed that a nucleotide has been inserted into one of the sequences or one has been deleted from the other. It is often too difficult to determine whether the difference is a result of an insertion or a deletion and thus it is called an ?indel.? Indels can be of virtually any length.
To put this number into perspective, a typical page of text might have 4,000 letters and spaces. It would take 10,000 such full pages of text to equal 40 million letters! So the differences between humans and chimpanzees include ~35 million DNA bases that are different, ~45 million in the human that are absent from the chimp and ~45 million in the chimp that are absent from the human.
Creationists believe that God made Adam directly from the dust of the earth just as the Bible says. Therefore, man and the apes have never had an ancestor in common. However, assuming they did for the sake of analyzing the argument, then 40 million separate mutation events would have had to take place and become fixed in the population in only ~300,000 generations?a problem referred to as ?Haldane?s dilemma.? This problem is exacerbated because the authors acknowledge that most evolutionary change is due to neutral or random genetic drift. That refers to change in which natural selection is not operating. Without a selective advantage, it is difficult to explain how this huge number of mutations could become fixed in the population. Instead, many of these may actually be intrinsic sequence differences from the beginning of creation.
Some scientists are surprised at the anatomical, physical and behavioral differences between man and chimpanzee when they see so much apparent genetic similarity. With a philosophy that excludes a Creator God, they are forced to accept similarity as evidence of common ancestry. However,
similarity can also be the result of a common Designer.