X-autosome chromosome fusion. IL and XR telomeres are fused. Generated in a trt-1(ok410) mutant N2 background. Although outcrossed, ok410 might still be present in the background. Reference: Lowden M, et al. Genetics. 2008 Oct;180(2):741-54. doi: 10.1534/genetics.108.089920. PMID: 18780750.
