Assertion: The genetic material condenses during prophase to create compact mitotic chromosomes that are made up of two chromatids joined at the centromere.
Reason: The cycle's prophase comes right after the S and G2 phases.
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B
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D
Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
The cycle's prophase, which comes just after the S and G2 phases, is characterised by the condensing of the genetic material into compact mitotic chromosomes made of two chromatids joined at the centromere.
The start of the construction of the mitotic spindle, the microtubules, and the proteinaceous cytoplasmal elements that aid in the process mark the end of the prophase.
The nuclear envelope begins to fall apart.
Option 1 is the correct answer.