With respect to metaphase, which of the following statements is incorrect?

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Chromosomes are highly condensed.

Metaphase chromosomes are made up of four sister chromatids held together by a centromere.

Chromosomes lie at the equator of the cell.

Complete disintegration of the nuclear envelope takes place.

answer is C.

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Detailed Solution

In metaphase, chromosomes consist of two sister chromatids held together by a centromere. The sister chromatids are replicated copies of the same chromosome and remain attached at the centromere until anaphase, when they are separated.
(1) During metaphase, the nuclear envelope is completely disintegrated.
(2) In metaphase, chromosomes are fully condensed and visible as distinct, compact structures under a light microscope.
(4) In metaphase, chromosomes align along the equatorial plane of the cell, ensuring equal distribution of genetic material to the daughter cells during cell division.

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