Only clones or identical twins have identical DNA. Genetic drift and diversity are necessary for natural selection to take place - there has to be a variety of traits to select from. An example is the mutation that enables adults to produce lactase. This adaptation is very common in populations of traditional milk drinkers, but uncommon in regions where dairy is not part of the traditional diet.
2006-06-29 06:35:47
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answer #1
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answered by injanier 7
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Who said Darwin was correct? And to the Above character why would all of our DNA be the same becase god created us? Because you think that? Why would he do anything in a way that you would think
2006-06-29 11:19:50
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answer #2
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answered by Anonymous
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when was the last time a human had a beneficial mutation
certain DNA stays the same, for example we all have 2 arms, 2 legs, 2 eyes, a nose, mouth etc.
some mutations occur that obscure these or even delete them.
2006-06-29 12:02:16
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answer #3
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answered by Brad 4
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Because Darwin's theory also states that mutations occur, and the fittest thrive, so beneficial mutations tend to stay.
But not all mutations are extremely good or extremely bad, so they tend to stick around as well.
We're not all clones.
2006-06-29 11:27:36
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answer #4
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answered by bequalming 5
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I don't believe in Darwin's theory. The apes might have looked like us acted like us etc. But they aren't us they weren't our ancestors nor were they part of the human race.
2006-06-29 12:08:55
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answer #5
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answered by Ultimate Chopin Fan 4
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Portions of ourt DNA stay the same
2006-06-29 11:21:55
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answer #6
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answered by Guillermo S 6
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COSIDER A PERSON WITH DNA CODE 'XY' MARRIES A WOMAN WITH DNA CODE 'XX' THE PROGENY WILL HAVE EITHER XX OR XY CHARACTERS.IN THE PROGENY OF XX ONE X COMES FROM MALE AND OTHER FROM FEMALE,SO THE CHARACTERS GETS MIXED AND A NEW DNA IS FORMED.
2006-06-29 14:17:51
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answer #7
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answered by VIVEK 1
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dna is really really easy to alter and over time there will be lots of variation based on adaption to environment
2006-06-29 11:16:41
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answer #8
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answered by shiara_blade 6
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evolution changed it, duh.
wouldn't it make more sense to ask if we are all made in god's image, then all DNA should be the same
2006-06-29 11:17:03
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answer #9
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answered by Anonymous
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