The structure present on the chromosomes is:

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(B) The $Centromere$ is a specialized $DNA$ sequence of a chromosome that links a pair of sister chromatids. During mitosis,spindle fibers attach to t

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Centromere

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(B) The $Centromere$ is a specialized $DNA$ sequence of a chromosome that links a pair of sister chromatids. During mitosis,spindle fibers attach to the $Centromere$ via a protein complex called the $Kinetochore$. Other options like $Nucleolus$,$Centrosome$,and $Golgi$ $complex$ are distinct cellular organelles or structures not located on the chromosome itself.

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The given diagram shows the types of chromosomes (labelled as $A, B, C$ and $D$) based on the position of the centromere. Which one is the correct option for the labelled chromosomes $A, B, C$ and $D$?

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