Explain why totipotency in plant cells makes it possible to produce large numbers of genetically identical plants from a single parent plant using tissue culture techniques.

Totipotency means that each plant cell contains the complete genome of the parent plant, so it can give rise to any cell type.

Because of this, a small piece of tissue (explants) taken from a parent plant can be induced to dedifferentiate by adding auxins and cytokinins to the culture medium.

The dedifferentiated cells form a callus, which is a mass of undifferentiated, totipotent cells.

This callus can be divided and then redifferentiated into whole plants; all the new plants contain the same genetic material as the parent, so they are clones produced in large numbers.

Examiner_tips:
- State totipotency and its significance.
- Mention auxins/cytokinins and callus formation.
- Explain that callus can be sub‑divided and redifferentiated.
- Conclude that all plants are genetically identical.

Common_mistakes:
- Forgetting that totipotency refers to the genome, not just cell type.
- Not mentioning the role of plant growth regulators.
- Mixing up differentiation and dedifferentiation.