Question

Sequence data from four OTUs are provided in the table below with values provided as (percentage distance x 1000) measurements. Determine the branch lengths on the phylogenetic tree from the data in the table below using the UPGMA procedure mentioned in class. Hedgehog Beaver Chipmunk Mole Hedgehog Beaver 82 - Chipmunk 136 56 Mole 22 118 143 The structure of the tree is given below. The branch lengths are not to scale, but the branch labeled "a" is shorter than the branch labeled "c". Determine the proper numerical value for the branch labeled "a" on the tree. Round your answers properly to two decimal places. Answer:

Determine the proper numerical value for the branch labeled "b" on the tree. Round your answers properly to two decimal places.

Determine the proper numerical value for the branch labeled "c" on the tree. Round your answers properly to two decimal places.

Determine the proper numerical value for the branch labeled "d" on the tree. Round your answers properly to two decimal places.

Answer 1

TH B CM B / 82 - C / 136 56 M 22 118 Smallest distance - 14- is 22 between M f H. I dmn = 22 new distance matrix with respect to Now make Mand H. M-H B C B 100 1139.5 - 56 100 distance between 6 and dBm & dBH = - 2 distance between C and demt deH = M-H - 118+82 = 2 Mr- 143 + 136 = 139.5

Smallet distance 56 between B and a dBc 56 28 2.8. New distance matn't with respect to B-C. B-C M-H M-H Bc 119.75 distance b/w M-H & B-C (dB-MH) + (de-mm = = loot 139.5 = 119.75 d = 59.875 119.75 = 2 (59.875-11) 48.875 1 m L H 314815 (59.875-28) 2.8 a = 11 b= 48.87 C = 28 d = 31.87