What is the purpose of sequencing DNA ?

Question

What is the purpose of sequencing DNA ?

Answer 1

The main reason its to study genes and find out how they work, but there are a lot other reasons to sequencing DNA. You can compare genes or specific sequences to find out differences and similarities and for example classify organism, make a disease diagnosis, find out the evolutionary line of an organism and so on.

A practical application could be the genomic therapy, a new way of   medicine that can make possible change the genes that cause a malformation and cure it. Trough the DNA sequencing would be able to know where exactly into genome or a gene is the mutation that causes the malfunction.