The structures that line up the chromosomes on the equatorial plate during metaphase are called?

Asters

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Polar and kinetochore microtubules

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Centrosomes

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Centrioles

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Solution

The correct option is B Polar and kinetochore microtubules
In metaphase, the centromere of the chromosomes aligns themselves on the metaphase plate ( equatorial plate), an imaginary line that is equidistant from the two centrosomes plate. This even alignment is due to the counterbalance of the pulling powers, generating by opposing kinetochore microtubules.

So the correct option is "Polar and kinetochore microtubules".

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Similar questions

Q. A cell has 10 chromosomes arranged on the equatorial plate during metaphase I. Predict the number of chromosomes that will be arranged on the equatorial plate during metaphase II.

In Anaphase of mitosis:
(I) Chromosomes move to equator and get aligned along metaphase plate.
(II) Centromere of each chromosome is towards the equator when chromosomes move away from the equatorial plate.
(III) Each chromosome arranged at the metaphase plate splits simultaneously.

Q. In anaphase of mitosis:

(a) Chromosomes move to spindle equator and get aligned along metaphase plate.

(b) Centromere of each chromosome is towards the equator when chromosomes move away from the equatorial plate.

Q. Number of chromosome groups at equatorial plate of metaphase I of plant having

2 n = 60

chromosomes, will be?

Q. Chromosomes in metaphase get arranged at the equatorial plate (see Fig. 1). When these cells are treated with colchicine, cell division is arrested and the cells never enter anaphase. If we were to compare a colchicine treated cell at metaphase and an untreated cell in the same phase, we notice that chromosomes are more dispersed and do not arrange themselves on the equatorial plate in the treated cells (see Fig 2.).
Using this information, which of the following will be affected by colchicine?

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