only marginally significantP =0.076
The pseudogenes on the neo-X showed a higher ratio of genes with female-benefit/male-detriment effects to genes with male-benefit/female-detriment effects than functional genes (16/13 [1.23] versus 29/51 [0.57], respectively), although the difference was only marginally significant ( χ 2 test: χ 2 =3.1, d.f.=1, P =0.076, Table 1 ).