This "mechanism" that creates new genes is called mutation. DNA, over millions of years, does tend to change randomly. Individuals with unfavorable mutations die out, while those with favorable mutations live to pass them on. Eventually, enough mutations are in the gene pool of a population that it can be consideted a separate species from its ancestral species.
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Edited by SSG ACM: 5/1/2015 5:08:59 AM[quote]DNA, over millions of years, does tend to change randomly.[/quote]Why? DNA is still DNA. Why would it need to change? Why randomly? Wouldn't it be out of necessity? If evolution is true, it is not random, but specifically aimed at a function of life that needs improving. Accordingly, life is not an RNG.
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Edited by Shrek Almighty: 5/1/2015 1:02:12 PMA great degree of processes in the universe are based on randomness and chance. If everything were based on strict, rational laws, there would be no need for science. DNA, over millions if years, is unstable. Errors that occur during replication are not always corrected by enzymes inside a cell.
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Edited by Siffera: 5/1/2015 5:26:28 AMNothing in life is perfect so mistakes are made. It's not something that's needed but sometimes it can be beneficial. It is not aimed to better life, as it can also be a bad thing. Much like what was mentioned before.