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. 2018 Jul 30;14(7):e1007526. doi: 10.1371/journal.pgen.1007526

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© 2018 Fuller et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — (A) The right arm of the X chromosome (XR) of D. persimilis is normally inverted as compared to its sister species, D. pseudoobscura, but the D. persimilis Sex-Ratio chromosome is collinear with its sister species. (B) Polytene chromosome squash of a D. persimilis SR/D. pseudoobscura hybrid female demonstrating perfect interspecies collinearity on XR. (C) Amplification and sequencing of the proximal breakpoint of the D. persimilis inversion reveals that the breakpoints are collinear at the base-pair level.