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Updated: Jul 14, 2026

Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats
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Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats

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True hermaphroditism in a phenotypic male without ambiguous genitalia: an unusual presentation at puberty

Guillermo Alonso1, Titania Pasqualini, Julio Busaniche

  • 1Departamento de Pediatría, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina. guillermo.alonso@hospitalitaliano.org.ar

Hormone Research
|May 17, 2007
PubMed

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Evolution
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The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
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X-linked Traits

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