During the metaphase stage of mitosis, spindle fibres attach to chromosomes at the:
Correct answer: A. Kinetochore
- A. Kinetochore
- B. The centromere and the kinetochore
- C. Centromere, kinetochore and the areas adjoining the centromere.
- D. Centromere
Explanation
In metaphase, chromosomes consisting of two sister chromatids get arranged at equator. Discontinuous fibres radiate out from two spindle poles and get connected to the disc-shaped structure at the surface of the centromere called kinetochores. These are known as chromosome fibres or tractile fibrils. A kinetochore is a complex protein structure that is analogous to a ring for the microtubule hook; it is the point where microtubules attach themselves to the chromosome.
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