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Evolution of Man

So we are 98% genetically the same as apes. How do we know this, how is this possible, and what theories/laws does this support?

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Humans and chimpanzees have in common more than 98% of DNA and 99% of genes. Despite this commonness, humans are different from chimpanzees in looks and in behavior. It had been postulated by scientists that this may be due to the manner in which the common genes (between the organisms) expressed themselves rather than due to differences in the genes themselves.

It had earlier been believed that any organisms looks and behavior is determined by the gene sequence - the manner in which genes were arranged and that different gene sequences would lead to different organisms. However, research has shown that it is gene activity and not gene ...