Table 1. Phenotypic comparison of rib-1 and rib-2 mutant alleles.

Allele	Molecular Lesion	Overall phenotype of animals		Reference
		Homozygous M-/- Z-/-	Maternally rescued M+/- Z-/-
rib-1 (tm516)	486 bp deletion and 32 bp insertion	99% of embryos die 1% die as first stage larvae	Complete development to adulthood 54% adults defective for egg-laying	[32]
rib-1 (ok556)	905 bp deletion	Embryos and early larvae die	Viable in this generation (no further information available)	[33]
rib-1 (qm32)	Stop to Lys	14% viable, become adults 100% of adults are defective for locomotion and egg-laying 32% of embryos die 80% of hatchlings die as larvae	Fully rescued larvae and adults, no lethality Wild-type development, locomotion and egg-laying	[54] This study
rib-2 (qa4900)	511 bp deletion	97% embryos die 3% remaining morphologically abnormal and die in first larval stage	Adults defective for locomotion and egg-laying	[34]
rib-2 (tm710)	1306 bp deletion	Embryos die	Viable in this generation (no further information available)	[32, 33]
rib-2 (qm46)	R434Q	63% viable, become adults 100% of adult are defective for locomotion and egg-laying 15% of embryos die 26% of hatchlings die as larvae	Fully rescued larvae and adults, no lethality Wild-type development, locomotion and egg-laying	[54] This study
rib-1 (qm32); rib-2 (qm46)	Stop to Lys R434Q	100% embryos die	Complete development to adulthood, but 100% adults are defective for locomotion and egg-laying	This study