Gametogenesis defects associated with <i>csr-1</i>, <i>ekl-1</i>, <i>drh-3</i>, and <i>ego-1</i> single and double mutants.

Alleles used were ego-1(om84), ekl-1(om83), drh-3(tm1276), and csr-1(tm892). Animals were grown at 20°C and characterized at 24 hr post-L4 stage. At a slightly later time point (66–72 hr post-L1 stage), most animals contain oocytes, hence the absence of oocytes indicates a delay in the sperm-to-oocyte switch. (N), number of germ lines counted. 1Percent of germ lines where oocytes were absent at the time of assay; note that wildtype germ lines all contain oocytes at this stage. 2Percent of germ lines where sperm nuclear morphology was highly irregular. *Abnormal sperm morphology was less severe than for the other genotypes (see Results). 3Percent of oogenic germ lines with univalents; typically, a subset of diakinesis nuclei contained univalents and a subset did not. 4Number of chromosomes at diakinesis in nuclei with at least one set of univalent chromosomes. Nuclei with 6 bivalents are not included in the calculation. Standard error of the mean (±#) is indicated. The range of observed values is indicated in brackets; e.g., among ego-1 nuclei with univalent chromosomes, a range of 7–9 chromosomes were observed. NA, not applicable. ND, univalents were observed, but not counted.