Ormally, crossing over occurs between homologous regions of homologous chromosomes. sometimes mistakes happen, and crossing over occurs between nonhomologous regions of homologous chromosomes, resulting in duplications and deletions. what characteristic of a chromosome would make nonhomologous recombination more likely

Chromosomes that have little duplicated regions within them or similarities in their sequences

Explanation:

although non-homologous recombination does not requires homologous regions, it  typically utilize short homologous sequences or similarities in their sequences which result in mismatched alignments.

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