Question

In which of the following phases of karyokinesis do chromosomes align at the equatorial plate, and spindle fibres are completely formed?

• A. Prophase
• B. Metaphase
• C. Anaphase
• D. Telophase

Hint:

Metaphase is the stage where the spindle fibers align chromosomes at the center before they are pulled apart.

Answer 1

The Correct Option is B

During metaphase of karyokinesis, chromosomes align at the equatorial plate, and spindle fibers fully form.

Metaphase is a pivotal stage in mitosis and meiosis, marked by:

• Chromosome alignment: Condensed, visible chromosomes position themselves at the cell's equatorial or metaphase plate, ensuring correct placement for separation.
• Spindle fibers: Fully formed microtubule spindle fibers extend from opposite cell poles (centrosomes) and attach to chromosome centromeres via kinetochores.

This stage is essential for guaranteeing each daughter cell receives the precise chromosome count during anaphase, when chromosomes migrate to opposite poles.