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Peer-reviewed veterinary case report

Intersex horse with X chromosome trisomy - what does it mean?

By Moreno-Millan, M et al.·Published in The Veterinary record·1989·Department of Genetics, Spain·View original on PubMed

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Original publication title: An intersex horse with X chromosome trisomy.

Species:
horse
Drinking & peeingHorses

Plain-English summary

Researchers found an unusual condition in a Spanish-bred horse that has both male and female traits, known as intersexuality. They discovered that this horse has an extra X chromosome, which is a genetic abnormality. This case is significant because it's the first time anyone has linked this specific genetic issue to intersexuality in any domestic animal.

Abstract

An X-trisomy has been detected in an intersexuality Spanish-bred horse by using G- and C-banding methods. The external characteristics and the behavioural and physiological irregularities of the horse are described. This is the first time that an association between an X-trisomy and a case of intersexuality has been reported in any domestic animal.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/2922913/