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Name the chromosome region where centromere is situated

Name the chromosome region where centromere is situated. How chromosomes categorized in relation to the situation of their centromere?

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The chromosome region where the centromere is situated is named as primary constriction. In the electronic microscopic view this region is narrower (or a stricture) than most component of chromosome. According to the position of primary constriction the chromosomes are categorized as metacentric, submetacentric, acrocentric or telocentric.

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