centromeric index

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The percentage of the total length of a chromosome encompassed by its shorter arm. For example, in human somatic cells during metaphase, chromosomes 1 and 13 have centromeric indexes of 48 and 17, respectively. Therefore, chromosome 1 is metacentric with its short arm occupying 48% of the total length of the chromosome, and chromosome 13 is acrocentric with a short arm that only occupies 17% of the total length.

Subjects: Genetics and Genomics.

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