Significance Of Mitosis

The correct option is (B) : Root tip

A root tip is a component of a plant that grows quickly. Numerous cells will be going through various phases of mitosis. Cells can be seen in these several phases at one moment. Onion, lentil, and barely roots are the most often utilised roots. Additionally, when stained, the chromosomes are huge and extremely black. Therefore, root tip is employed in labs to analyse mitosis.

Mitosis is a fundamental process for cell division, enabling the formation of two identical daughter cells. Let's assess each statement provided above to determine which one is incorrect with reference to mitosis:

• All the chromosomes lie at the equator at metaphase: In mitosis, during metaphase, chromosomes align at the equatorial plate of the cell, forming what is known as the metaphase plate. This statement is correct.
• Spindle fibres attach to centromere of chromosomes: During mitosis, spindle fibres attach to a specialized protein structure on the chromosomes known as the kinetochore, which is located at the centromere but not the centromere itself. This statement is incorrect as phrased.
• Chromosomes decondense at the telophase stage: During telophase, chromosomes begin to decondense back into their tangled state when the nuclear envelope reforms around them. This statement is correct.
• Splitting of centromere occurs at anaphase: In anaphase, the centromeres split and sister chromatids are pulled apart to opposite poles of the cell. This statement is correct.

Thus, the incorrect statement with reference to mitosis is: Spindle fibres attach to centromere of chromosomes. Spindle fibres actually attach to the kinetochores.