- organism hypersensitive X ray irradiation
Animals respond to iononizing radiation at a lower dose or a shorter exposure compared to control animals. Iononizing radiation has a wavelength in the 10 to 0.01 nanometer range. In C. elegans, increased sensitivity to X-ray irradiation is often observed as a decrease in survival upon exposure compared to control animals given the same treatment.
- male tail morphology variant
Animals exhibit variations in the structure or organization of the somatic reproductive components of the posterior segment of the male from that observed in control males. In C. elegans, this region of the male includes the terminal canals of the reproductive tract, the digestive tract, and spicule channels along with the male specific sensilla (ray, post-cloacal, hook and spicule) and extends to the tip of the acellular fan.
- male ray morphology variant
Animals exhibit variations in the structure or organization of any of the finger-like sensory sensilla that project from the tail and embed in the male fan compared to control animals. In C. elegans, nine bilateral rays project from the tail in a radial pattern with a smooth and slightly tapered appearance. Although one neuronal member of each ray sensillum is exposed to the outside, male rays rarely take up dye.
- plugged excretory pore
Males receive copulatory plugs from other males, deposited on their excretory pores. This phenotype is polymorphic among C. elegans strains and also in C. briggsae.
- sodium acetate chemotaxis defective
Failure in directed movement in response to sodium acetate. In C. elegans, sodium acetate is an attractant. Sodium acetate has also subsequently been used to assay for Na+ attraction in C. elegans.
- embryonic lethal
Animals die during embryonic development. In C. elegans, often assayed as refractile eggs that fail to hatch; when applied to large-scale RNAi screens in C. elegans, more than 10% of embryos die.