20.181:sadEvoModel

the code below returns 0.9 if x and y are the same; 0.1 if they're different, regardless of branch lengths. use this function if you can't derive the Jukes-Cantor model and would like to move on to the next portion of the assignment.

 def evoModel_Sad(x,y,distance):


 * if x == y:
 * return 0.9
 * return 0.1

