The silkworm Z chromosome is enriched in testis-specific genes.

@article{Arunkumar2009TheSZ,
  title={The silkworm Z chromosome is enriched in testis-specific genes.},
  author={K. P. Arunkumar and Kazuei Mita and Javaregowda Nagaraju},
  journal={Genetics},
  year={2009},
  volume={182 2},
  pages={493-501}
}
The role of sex chromosomes in sex determination has been well studied in diverse groups of organisms. However, the role of the genes on the sex chromosomes in conferring sexual dimorphism is still being experimentally evaluated. An unequal complement of sex chromosomes between two sexes makes them amenable to sex-specific evolutionary forces. Sex-linked genes preferentially expressed in one sex over the other offer a potential means of addressing the role of sex chromosomes in sexual… CONTINUE READING