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Related Experiment Video

Updated: Jul 9, 2026

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Published on: January 10, 2025

Male development.

Scott W Emmons¹

¹Department of Molecular Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA. emmons@aecom.yu.edu

Wormbook : the Online Review of C. Elegans Biology

|December 1, 2007

Summary

Male C. elegans develop distinct mating structures from specific cell sets during postembryonic development. These include specialized neurons, muscles, and hindgut cells, orchestrated by genetic and cell interaction programs.

Area of Science:

Developmental Biology
Genetics
Neuroscience

Background:

The nematode Caenorhabditis elegans exhibits sexual dimorphism, with males possessing unique structures for mating.
Understanding the genetic and cellular basis of male development is crucial for comprehending sexual differentiation in multicellular organisms.

Purpose of the Study:

To detail the cellular and genetic mechanisms underlying the development of male-specific structures in C. elegans.
To identify the cell types and gene functions involved in male postembryonic development.

Main Methods:

Analysis of cell lineage and fate determination in male-specific blast cells.
Genetic and molecular studies to identify key developmental genes.
Examination of cell-cell interactions in patterning male reproductive and sensory structures.

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Skeletal Muscle Gender Dimorphism from Proteomics

Skeletal Muscle Gender Dimorphism from Proteomics

Published on: December 14, 2011

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Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Published on: January 10, 2025

Skeletal Muscle Gender Dimorphism from Proteomics

Skeletal Muscle Gender Dimorphism from Proteomics

Published on: December 14, 2011

Main Results:

Male mating structures, including tail fan, hook, and spicules, form just before the final larval molt from three sets of male-specific blast cells.
Development involves 205 male-specific somatic cells: 89 neurons, 36 neuronal support cells, 41 muscles, 23 hindgut cells, and 16 hypodermal cells.
Male-specific neurons extend axons to enlarge posterior ganglia, and new muscles are generated for copulation.

Conclusions:

Male development in C. elegans is a complex process involving specific cell lineages, genetic programs, and cell interactions.
Many genes involved in male development also function in hermaphrodites, highlighting conserved developmental pathways.
The differentiation of male-specific structures involves precise neuronal wiring and specialized tissue remodeling.