acentric chromosome

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Noun1.acentric chromosome - a chromosome lacking a centromereacentric chromosome - a chromosome lacking a centromere  
chromosome - a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order; "humans have 22 chromosome pairs plus two sex chromosomes"
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The acentric chromatid poleward movement is mediated through DNA tethers that connect the acentric fragment to its centric partner.
1986) state that the irregularity is generally associated with chromosome breakage and acentric fragments of different sizes, which may remain in the cytoplasm as micronuclei.