Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only.)
Duplicated chromosomes are joined at a point termed:
Topic: Centromere
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Answer
(b) Centromere.
A duplicated chromosome consists of two identical sister CHROMATIDS joined at a single constricted point, the CENTROMERE. It is also where the spindle fibres attach.
The three similar-sounding words must be kept apart, and the question offers all of them deliberately: CENTROMERE — the joining point ON the chromosome CENTRIOLE — a paired structure in the animal cell cytoplasm that organises the spindle CENTROSOME — the region containing the centrioles CHROMATID — one of the two halves being joined, not the joint itself
Read the question again: it asks for the POINT where they are joined, so the chromatid cannot be right.
Centromere.