Matured C. elegans sperm cells (spermatozoa) by scanning electron microscopy (SEM). The knobby projections to the right of the cell are called a pseudopod, which the cell uses to crawl. See also TEM (Transmission Electron Microscopy) image of C. elegans sperm cells. Courtesy of Sam Ward Lab.
C. elegans nerve system is labeled with GFP to show the neuronal interconnectivity. C. elegans has a simple and well-defined nerve system that includes 302 neurons. See also more information on C. elegans neuron research. Courtesy of the C. elegans Worm Art Show.
A C. elegans with nuclei (DNA) labeled (DAPI stained). Each colored spot (light blue) represents a cell of the C. elegans. Courtesy of Sarah Crittenden, Kimble Lab and John White, LOCI.
C. elegans and C. briggsae. These worms are closely related, and both used for research. Image from Wormbase.
Distal tip cell, the lower right irregular shaped cell, is a single somatic cell located to the tip of a C. elegansgonad. As a result, a hermaphrodite has total 2 distal tip cells, one on each end of the gonad. The cells adjacent to the distal tip cell in this image are germ cells. Please see the Kimble Lab website for more information. Distal Tip Cell by David Greenstein.
Isolated C. elegans gonad with the nuclei labeled. The distal tip cell would be located to the right most of the image. From the distal tip cell end to oocytes, there are germ cells in various states of maturation. Image courtesy of the Schedl Lab.
Early embryonic development (metaphase in mitosis) over time, from upper left to lower right with tubulin (microtubules) labeled, showing the elongation of the mitotic spindle prior to the first cell division. Courtesy of Ahna Skop, Skop Lab.
DIC (Differential Interference Contrast/Normaski) images of a C. elegans' embryonic development from the first cell division to a 2-fold stage embryo. Courtesy of the C. elegans Worm Art Show.
C. elegans DIC/Nomarski image by Maria Gallegos, Kimble Lab.
An observable characteristic of an organism that arises from environmental factors, or a combination of environmental and genetic (genotype) factors. Organisms with the same genotype can have very different phenotypes.