Question

Write a Python code that takes two sequences CATCGTCCT and CACCGACCG and prints the point mutations found when aligning the two sequences. Tip: you simply need to write a for loop to go over the length of the sequences, pick a letter from each position,and, compare the two sequences position by position for matches and report the mismatches.

Answer 1

Following are the code to the given question:

def match_sequence(s1,s2):#Defining a method match_sequence that accepts two parameters

for l in range(len(s1)):#defining a loop that checks range of s1 value

if(s1[l] != s2[l]): # use if block to match each sequences

print('The sequence does not match at index: ',l+1)#print value with message

s1 = 'CATCGTCCT'#defining a string varible s1

s2 = 'CACCGACCG'#defining a string varible s1

match_sequence(s1,s2)#calling a method that prints its values

Output:

The sequence does not match at index: 3

The sequence does not match at index: 6

The sequence does not match at index: 9

Explanation:

In this code, a method "match_sequence" is declared that takes two string variable "s1 and s2" in its parameters, and inside the method, a loop is declared that checks the range of s1 value and use if block to match each sequence and use a print method that prints it values.

Outside the method, two string variables are declared that holds a string value that passes into the "match_sequence" method and calls it.