Which of the following statements is true for prophase?
i) Initiation of condensation of chromosomal material
ii) The centrosomes begin to move towards opposite poles of the cell
iii) Chromosomes are composed of two chromatids attached together at the centromere.
iv) Initiation of the assembly of a mitotic spindle.
v) Cells at the end of prophase do not show golgi complexes, endoplasmic reticulum nucleolus and the nuclear envelope.
vi) Spindle fibers attach to kinetochores of chromosomes.

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(i), (ii) and (iii) only

(i), (ii), (iii), (v) and (vi)

(i), (ii), (iii), (iv) and (v)

All except (v)

answer is C.

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Detailed Solution

Key features of Prophase :

Chromosomal material condenses to form compact mitotic chromosomes.

Chromosomes are seen to be composed of two chromatids attached together at the centromere. Centrosome which had undergone duplication during interphase, begins to move towards opposite poles of the cell.

Each centrosome radiates out microtubules called asters.

The two asters, together with spindle fibres, form a mitotic apparatus.

Cells at the end of prophase, when viewed under the microscope, do not show golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope.

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