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Non-allelic homologous recombination (NAHR) between two chromatids. (A) Meiotic misalignment. The gray cross represents unequal crossing over between the two chromatids. This phenomenon is facilitated by the presence of low copy repeats (red and green squares). (B) The unequal crossing over leads to the emergence of one gamete with a deleted region and one gamete with a duplicated region.
