Write a Python program that takes as input aligned sequences in 
FASTA format and

1. computes a Jukes-Cantor distance matrix, and

2. computes a UPGMA tree from the distance matrix

Your program should print the tree in Newick format. 

Submit one .py file containing your solution. 

Test your program on the haemoglobin sequences provided on the 
course website. Your resulting tree should be similar to the one
obtained with the Jukes-Cantor distance matrix also posted on the
course website.

HOW TO SUBMIT YOUR ASSIGNMENT:

Email your files to the grader Xin Gao at xg54@njit.edu.

DUE DATE: 2:30pm, May 7th, 2013

EXTRA CREDIT:

You have the opportunity to add 5 points to your total in the
class. So if your program is fully correct, which means it runs and
produces correct output, then your total points in the course will 
be increased by 5. To get any points it is important that your program
run without syntax errors.

Good luck!