SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In its condensed form, the duplicated chromosome has a narrow ‘waist’ at a specialized region called the ____ where the two sister chromatids are most closely attached
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centrioles
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cytokinesis
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centromere
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None of the above
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Explanation:
Detailed explanation-1: -The centromere appears as a constricted region of a chromosome and plays a key role in helping the cell divide up its DNA during division (mitosis and meiosis). Specifically, it is the region where the cell’s spindle fibers attach.
Detailed explanation-2: -A chromatid is a condensed DNA subunit of a chromosome. The two chromatids of a duplicated chromosome are held together at a region of DNA called the centromere (see figure below).
Detailed explanation-3: -The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere.
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