Question

Which phase of mitosis is responsible for condensed structure of chromosomes?

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

Answer 1

The correct option is B Prophase

Prophase is the stage of mitosis, which is characterized by spindle formation, shortening and thickening of chromosomes, disintegration of nuclear envelope and disappearance of nucleolus.
Metaphase proceeds prophase and is marked by movement of chromosomes towards the equator of cell mediated by kinetochore microtubules of spindle fibres. Alignment of chromosomes on equatorial plane of spindle, the metaphase plate, marks the end of metaphase.
Anaphase is the stage of mitosis which is characterized by separation of sister chromatids followed by their movement towards the opposite pole of spindle.
Completion of separation of sister chromatids which are now present at the opposite poles of cell marks telophase. The cell resumes the interphase state during telophase.
Intephase is phase between two mitosis and prepares the cell for next division. This makes option B correct.