FIGURE 1.1. Schematic of the C.


Schematic of the C. elegans life cycle. Adult hermaphrodite C. elegans typically produce 100–200 self-fertilized eggs. Under normal conditions, larvae go through four larval stages, called L1–L4 (not shown); the time it takes to reach adulthood depends on cultivation temperature. If larvae develop under crowded or starved conditions, they enter an alternate larval stage, called dauer. If conditions permit, dauer larvae can exit the dauer stage and continue to develop into reproductive adults. In a normal self-cross, males are rare (0.1–0.2% of total F1 progeny). If a male is crossed to a hermaphrodite, the hermaphrodite effectively functions as a female, and males appear at the expected Mendelian ratio. This sexual dimorphism allows for genetic analysis in C. elegans via classical genetic mapping and double mutant analysis.

From: Chapter 1, From Odors to Behaviors in Caenorhabditis elegans

Cover of The Neurobiology of Olfaction
The Neurobiology of Olfaction.
Menini A, editor.
Boca Raton (FL): CRC Press/Taylor & Francis; 2010.
Copyright © 2010 by Taylor and Francis Group, LLC.

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