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Phylogeny of the Primates As promised, you are going to get your chance to create a phylogenetic tree from some molecular clock data. We are going to give you some mutation differences in DNA. This is just like the bird phylogeny we did. Below is a table of REAL data. This date represents difference in DNA. It is obtained by actually letting strands of DNA stick together. The tighter they stick, the more closely their sequences align. In the table, the higher the number, the less well it stuck, meaning the less closely aligned it was. We can use these numbers to draw a phylogenetic tree. To make things simpler, the data have been smoothed out a bit. Distance values among primates determined from DNA-DNA hybridization WhitePygmy Common Human Gorilla Orangutan handed Chimpanzee Chimpanzee Gibbon Human Pygmy Chimpanzee Common Chimpanzee 1.64 1.64 .73 Gorilla 2.32 2.32 2.32 Orangutan 3.57 3.57 3.57 3.57 4.79 4.79 4.79 4.79 4.79 7.21 7.21 7.21 7.21 7.21 White-handed Gibbon Cercopithecid Monkey 7.21 You can use these data just as we did with the bird data to create a phylogenetic tree showing relationships between these primates. If you need to see how to do this again, refer back to the assignment where we did this with bird DNA. Draw your phylogenetic tree of primates below: 0 1 2 3 4 5 6 7 8 You will place the 7 organisms across the top above the 0 line. The scale on the left is percent DNA difference. Don't worry if you can't figure out exactly where to put 2.79 or whatever; put it in approximately the right spot.