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Ovotestis
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An ovotestis is a gonad with both testicular and ovarian aspects.WEB,weblink eMedicine - Ovotestis : Article by Gail F Whitman-Elia, MD, 2008-01-02, WEB,weblink ovo-testes (formerly called "true hermaphroditism"), Intersex Society of North America, 2007-12-08, In humans, ovotestes are an infrequent anatomical variation associated with gonadal dysgenesis.JOURNAL, Salas-Cortés L, Jaubert F, Nihoul-Feketé C, Brauner R, Rosemblatt M, Fellous M, SRY protein is expressed in ovotestis and streak gonads from human sex-reversal, Cytogenet. Cell Genet., 91, 1–4, 212–6, 2000, 11173859, 10.1159/000056847,weblink In invertebrates that are normally hermaphroditic, such as most gastropods (snails and slugs) in the clade Eupulmonata, an ovotestis is a common feature of the reproductive anatomy.In mice, ovotestes are structured such that the central region is testicular tissue while the poles both contain ovarian tissue. Experiments involving the Sox9 gene, which is initiated by the SRY region of the Y chromosome, have shown the gene’s requirement for testicular differentiation from the presence of ovotestis formation within XX Sox9 trangenic mice. (6) Ovotestis within B6-XYPOS mice allow for gonadal development research within the same tissue to take place in ways previously unavailable.Gregoire EP et al. (2011). “Transient development of ovotestes in XX Sox9 transgenic mice.” Dev Biol. 394(1):65-77Wilhelm D, Washburn LL, Truong V, Fellous M, Eicher EM, Koopman P. Antagonism of the testis- and ovary-determining pathways during ovotestis development in mice. Mechanisms of Development. 2009;126(5-6):324-336.

In gastropods

File:Biomphalaria glabrata ovotestis.png|thumb|The ovotestis of the freshwater snail Biomphalaria glabrata. The area around the ovotestis is the hepatopancreashepatopancreasAn ovotestis or hermaphroditic gland (),{{hu icon}} Páll-Gergely B. (2008). "A Stylommatophora csigák ivarszervrendszerének magyar nyelvű nevezéktana". Malacological Newsletter 26: 37-42. PDF. is found as normal anatomical feature in the reproductive system of some gastropods including such species as the land snail Helix aspersa.JOURNAL, Chase R, Antkowiak T, Geoffroy E, Weatherill D, Why the ovotestis of Helix aspersa is innervated, Acta Biol. Hung., 55, 1–4, 239–49, 2004, 15270240, 10.1556/ABiol.55.2004.1-4.29,

See also

References

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