[Admin Edit:]
From the original paper, the 98% figure is still accurate.
Original (incorrect) post follows:
So much for the DNA being 98% the same for apes and man.
http://www.johnhawks.net/weblog/reviews/chimpanzees/genetics/chimpanzee-y-chromosome-2010.html
From the original paper, the 98% figure is still accurate.
http://dspace.mit.edu/openaccess-disseminate/1721.1/59332As expected, we found that the degree of similarity between orthologous chimpanzee and human MSY sequences (98.3% nucleotide identity) differs only modestly from that reported when comparing the rest of the chimpanzee and human genomes (98.8%). Surprisingly, however, > 30% of chimpanzee MSY sequence has no homologous, alignable counterpart in the human MSY, and vice versa (Supplementary Fig. 8 and Supplementary Note 3). In this respect the MSY differs radically from the remainder of the genome, where < 2% of chimpanzee euchromatic sequence lacks an homologous, alignable counterpart in humans, and vice versa. We conclude that, since the separation of the chimpanzee and human lineages, sequence gain and loss have been far more concentrated in the MSY than in the balance of the genome.
Original (incorrect) post follows:
So much for the DNA being 98% the same for apes and man.
http://www.johnhawks.net/weblog/reviews/chimpanzees/genetics/chimpanzee-y-chromosome-2010.html
This is from a new paper that's just shown up in the Nature advance publication zone. The authors are Jennifer Hughes and colleagues, and the subject is the first complete sequencing of the chimpanzee Y chromosome. "MSY" stands for "male-specific region of the Y chromosome" -- it's most of the Y, aside from a small fraction that recombines with the X chromosome.
More than thirty percent of the chimpanzee Y chromosome has no homolog in humans, and likewise for the human Y in chimpanzees.
I mean, really -- here's a map:
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