The gene for the SRY antigen also is on the short arm of the Y- chromosome. Thus, the short arm of the Y-chromosome is critical in testis determination. Intersexes Definition Animals in which the diagnosis of sex is equivocal because characteristic elements of both sexes are present at the same time are known as intersexes. Abnormalities are of genetic or chromosomal origin,or of inappropriate hormonal exposure or response to hormones. Variable degrees of sexual ambiguity are encountered in the external genitals.
Many true hermaphrodites are female in external appearance.
This type of intersex is rare in domestic animals. The gonads are testicles which are usually retained. The tubular components are basically female, and are usually hypoplastic. The external genitalia are mainly of the female type with an enlarged clitoris, or may be vestigial penile development. This type of intersex may occur in bovine or equine species.