GOslim categories significantly over-represented (odds ratio>1) or under-represented (odds ratio<1) in the test group relative to the entire chip (Fisher's exact test, Holm FWER<5%).

The first two test groups, for trans and for cis effects, consider genes differentially regulated relative to the average chromosomal trend. The third test group considers dosage compensated genes on the triplicated chromosome 5. Tests were conducted in the regime where the groups could accurately be delineated (strongly expressed genes, average expression A>A1+1, see Figure 5).