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Table 2 Origin of genes in each stratum on the Y chromosome

From: Assembly of the threespine stickleback Y chromosome reveals convergent signatures of sex chromosome evolution

  X ancestral, Y single copy X ancestral, Y duplicated Autosomal, Y single copy Autosomal, Y duplicated Unknown origin, Y single copy Unknown origin, Y duplicated Total
Stratum 1 114 (72.6%) 14 (9.0%) 3 (1.9%) 6 (3.8%) 19 (12.1%) 1 (0.6%) 157
Stratum 2 154 (80.6%) 11 (5.8%) 2 (1.0%) 11 (5.8%) 11 (5.8%) 2 (1.0%) 191
Stratum 3 233 (83.8%) 22 (7.9%) 3 (1.1%) 8 (2.9%) 11 (4.0%) 1 (0.3%) 278