Chromosome number is a remarkably dynamic feature of eukaryotic evolution. Chromosome numbers can change by a duplication of the whole genome (a process termed polyploidy), or by single chromosome changes (ascending dysploidy via, e.g., chromosome...
Some of the useful bioinformatics scripts.
For example ... contig-stats.pl is a Perl script that will automatically describe features of a sequence assembly.
http://milkweedgenome.org/?q=scripts