Sequence data from OTUs are provided in the table below with values provided as

Question

Sequence data from OTUs are provided in the table below with values provided as (pecentage distance x 1000) measurements. Determine the phylogenetic tree from the data in the table below using the UPGMA procedure mentioned in class Fairy Smurf Tribble Fairy Smurf 198 Tribble 7430 Which tree represents the correct shape/structure of the tree determined from these data? Tree Enter a number without the word 'tree Answer Determine the proper numerical value for the branch labeled "a on the correct tree. Round your answers properly to two decimal places Answer: Determine the proper numerical value for the branch labeled "b" on the corract tree. Round your answers properly to two decimal places Answer Determine the proper numerical value for the branch labeled "c on the correct tree. Round your answers properly to two decimal places Answer

Explanation / Answer

Ans : OUT is term that means individual samples under study. In the given study 3 samples are there, the data is in the form of distance matrix for 3 samples.

In UPGMA method, a tree is constructed that reflects the structure present in a pairwise similarity matrix.

D(Fairy, Smurf) Tribble = d(Fairy, Tribble) * 1 + d(Smurf, Tribble) *1/1+1

d(AB)C/2 = [d(AC) + d(BC)]/2

                 = (74 + 30)/2

                 = 52

Thus, the values are,

a = 74

b = 52

c = 198

Where, the tree 2 represents the correct tree for the given data.

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