Sequence identity between palindrome arms or inverted repeats, and between direct repeats, is maintained by NCO resolution of DSBs; such gene conversion could occur between sister chromatids or within a single chromatid. In the case of palindromes or inverted repeats, CO resolution between sister chromatids can generate an idicY and an acentric fragment, while CO resolution within a chromatid results in inversion. In the case of direct repeats, CO resolution between sister chromatids can generate a duplication and an interstitial deletion, while CO resolution within a chromatid yields an interstitial deletion and an acentric fragment.