- X0 lethal
XO-bearing individuals die preferentially over other animals in the population. In C.elegans, X0 animals die preferentially over XX animals.
- XX lethal
XX-bearing individuals die preferentially over other animals in the population. In C.elegans, XX animals die preferentially over X0 animals.
- lethal
Animals die prematurely at any stage of the life cycle.
- L4 lethal
Animals die at the L4 stage of the life cycle.
- L1 lethal
Animals die at the L1 stage of the life cycle.
- L3 lethal
Animals die at the L3 stage of the life cycle.
- L2 lethal
L2 lethal: Animals die at the L2 stage of the life cycle.
- 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.