You should start by adding the following lines at the start of your code:

use strict;
use warnings;

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Start working through your code defining variables and you'll find a few problems (e.g, delete($Dna[0]); is the first mention of $Dna).

In reply to Re: perl script to sort out the genes which i have in the human chromosome by marto
in thread perl script to sort out the genes which i have in the human chromosome by anisha3

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