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Sex
Biological terms
Sexual dimorphism Sexual differentiation Feminization Virilization Sex-determination system XY XO ZW ZO Temperature-dependent Haplodiploidy Heterogametic sex Homogametic sex Sex chromosome X chromosome Y chromosome Sex chromosome anomalies Testis-determining factor Hermaphrodite Sequential hermaphroditism Simultaneous hermaphroditism Intersex (biology) Mating type
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The ZO sex-determination system is a system that determines the sex of offspring in several moths. In those species, there is one sex chromosome, Z. Males have two Z chromosomes, whereas females have one Z. Males are ZZ, while females are ZO.

See also

• Y-chromosomal Adam
• Sex Determination in Silene
• Sex-determination system
• Sexual differentiation
• Haplodiploid sex-determination system
• XY sex-determination system
• XO sex-determination system
• ZW sex-determination system
• Temperature-dependent sex determination
• X chromosome
• Y chromosome

References

1. Traut, W.; Sahara, K.; Marec, F. (2007). "Sex Chromosomes and Sex Determination in Lepidoptera". Sexual Development. 1 (6): 332–346. doi:10.1159/000111765. PMID 18391545. S2CID 6885122.
2. "Genetic Mechanisms of Sex Determination - Learn Science at Scitable". www.nature.com.
3. Handbuch Der Zoologie / Handbook of Zoology. Walter de Gruyter. 1925. ISBN 9783110162103 – via Google Books.

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