Posted by: thenack on Apr 15, 2011
You have heard that old story, Humans and chimps have 98% of the same DNA. Not just a story, up until recently evolutionary scientists said this was a "fact" that supported evolution. Tuns out, it's not that simple.
Firstly what they don't tell you is that one of the largest studies compared 19.8million bases (basic DNA "word"). This is only about 1% of the total genome. doesn't that irritate you a little, that they say humans and chimps are basically the same based on comparing 1%? so it wasn't a "FACT" after all.
Lets look further, these studies left out the areas of biggest difference between humans and chimps, you can read more about nucleotide substitution and insertion and deletion. When some of this was included, the difference jumped to 5% between humans and chimps. So which "SCIENTIFIC FACT" should we now believe?
Quick recap: What was called a fact was hardly representative of human vs Chimp DNA using about 1% of the total. When more of the genome was used, the difference rose to 5% instead of 1.5% as previously claimed.
So, the science was good, but the assumptions were wrong. Incidentally, 5% relates to 150,000,000 different base pairs, thats a lot of information!!
NOW FOR THE REALLY INTERESTING STUFF: A number of studies have demonstrated a remarkable similarity in the nuclear DNA and mtDNA among modern humans. In fact, the DNA sequences for all people are so similar that scientists generally conclude that there is a ‘recent single origin for modern humans, with general replacement of archaic populations.’ (In other words, we all came from the same set of parents recently, but how recently?)
The estimates for a date of a ‘most recent common ancestor’ (MRCA) by evolutionists has this ‘recent single origin’ about 100,000–200,000 years ago. BUT these estimates have been based on comparisons with chimpanzees and the assumption of a chimp/human common ancestor approximately 5 million years ago (which again was based on other assumptions, which have been shown to be based on 1% DNA comparison).
Other studies that have used pedigrees or generational mtDNA comparisons (counting mutations) have yielded a much more recent MRCA—even 6,500 years. In other words, if you do not use the human/chimp assumption, genetics show 6500jears, which is basically what Genesis teaches. (the best science based on bad asumptions will probably be bad)
So to conclude, we see that human/chimp similarity is not so straight forward as evolutionists would like us to believe. Depending on which genes you count, you get different answers. No matter how amazing the genetic science is, it depends how you use it.
Also, depending on assumptions on human/chimp similarities, the common human ancestor (Adam and Eve if you will) can be either 100-200 thousand years old or +-6500 years old based on modern science (references below).
so do not let anyone tell you "science" says this or that, actually find out for yourself. There is much good science that says we have a common ancestor 6000 years ago, I say his name was Adam. The Bible said 6000 years all along, now it seems science is finally agreeing on this!
- Gagneux, P. and Varki, A. 2001. ‘Genetic differences between humans and great apes.’ Mol Phylogenet Evol 18:2–13.
- Gibbons, A. 1998. ‘Which of our genes make us human?’ Science 281:1432–1434.
- Heyer, E., Zietkeiwicz, E., Rochowski, A., Yotova, V., Puymirat, J., and Labuda D. 2001. ‘Phylogenetic and familial estimates of mitochondrial substitution rates: study of control region mutation in deep-rooting pedigrees.’ Am J Hum Genet 69:1113–1126.
- Kakuo, S., Asaoka, K. and Ide, T. 1999. ‘Human is a unique species among primates in terms of telomere length.’ Biochem Biophys Res Commun 263:308–314.
- Knight, A., Batzer, M.A., Stoneking, M., Tiwari, H.K., Scheer, W.D., Herrera, R.J., and Deninger, P.L. 1996. ‘DNA sequences of Alu elements indicate a recent replacement of the human autosomal genetic complement.’ Proc. Natl Acad Sci USA 93:4360–4364.
- Parsons T.J., Muniec, D.S., Sullivan, K., Woodyatt, N., Alliston-Greiner, R., Wilson, M.R., Berry, D.L., Holland, K.A., Weedn, V.W., Gill, P., and M.M. Holland. 1997. A high observed substitution rate in the human mitochondrial DNA control region. Nat. Genet. 15:363–368.
- Sigurgardottir, S., Helgason, A., Gulcher, J.R., Stefansson, K., and Donnelly P. 2000. ‘The mutation rate in the human mtDNA control region.’ Am J Hum Genet 66:1599–1609.
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