Question

While performing an experiment, a student observed that a cell under the microscope undergoing mitosis is at the telophase stage but not showing any furrow initiation. What can be the possible consequence of this?
[1 mark]

• A. Aneuploidy
• B. Polyploidy
• C. Monoploidy
• D. Haploidy

Answer 1

The correct option is B Polyploidy

Cell division is characterised by karyokinesis (nuclear division) followed by cytokinesis (cytoplasmic division).

The process of cytokinesis is accomplished by furrow formation (animal cells) or cell plate formation (plant cells) such that the parent cell gives rise to two daughter cells with the same chromosomal count as that of the parent cell in mitosis.

If the furrow formation is not taking place after telophase, then the number of chromosomes would remain double in the cell. This will give rise to a polyploid condition in which there are more than two sets of chromosomes.

Aneuploidy is the situation in which the cell has an abnormal chromosome number (either excess or deficit in copies) of a particular chromosome rather than a complete set of chromosomes.

Monoploidy or Haploidy (n) is the condition characterized by the presence of a single set of chromosomes.

Figure : Cell division