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).