Sub-chromosomal localization of mutations by medium and small indel-based mapping. The gel images show non-mutant (wild type, W) and mutant (M) pool of PCR amplified DNA from F2 worms. The histograms show ULVs for various indels. (A) dpy(sy5001) is most strongly linked to the medium indel cb-m197 (located roughly in the middle of chromosome X, ChrX-M) compared to flanking indels cb-m204 (left arm, ChrX-L) and cb-m136 (right arm, ChrX-R). (B) dpy(s1272), unc(sa972), and lin(bh20) are located on chromosome 3. While dpy(s1272) and unc(sa972) are strongly linked to bhP14 and bhP18 and appear to be on the left arm, lin(bh20) maps closer to bhP40 (center right region). (C) unc(sy5422) is tightly linked to indels bhP9 and bhP16 on the right arm of chromosome 4.