I'm new to the world of python and im trying to solve a question which I am given a few dna sequences, for example:
sequences = ["GAGGTAAACTCTG", "TCCGTAAGTTTTC", "CAGGTTGGAACTC", "ACAGTCAGTTCAC",
I want to know how many times the nucleotide "A" is in the first position  of all of those sequences (the answer should be 1 in that case). Im trying to use for loop but don't really know how to move forward. Ill appreciate any help, Thank you!