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Contrasting patterns of gene expression divergence on the X chromosome. Early in spermatogenesis the X chromosome has a similar proportion of DE genes compared to the autosomes, while there are fewer X-linked DE genes late in spermatogenesis. The shift in the number of observed/expected X-linked genes between early and late reflects the enrichment of X-linked genes induced early. Significance is based on chromosome-wise hypergeometric test for enrichment with FDR-corrected P-values.
