Resolving genomes, particularly plant genomes, is a very complex and error-prone task. This is because there are several copies of all of the chromosomes and they are very alike. A team of bioinformatics researchers from Heinrich Heine University Düsseldorf (HHU) has now developed a software tool that allows for precise assignment to the correct copies - a process known as 'phasing'. They present their development in the latest online edition of the journal Genome Biology.