Study the diagram given below which represents a stage during the mitotic cell division and answer the questions that follow: Study the diagram given below which represents a stage during the mitotic cell division and answer the questions that follow:
Identify the stage giving suitable reasons.
Topic: Telophase
Answer
The stage is TELOPHASE.
Reasons: the two sets of daughter chromosomes have reached OPPOSITE POLES of the cell; the NUCLEAR MEMBRANE is RE-FORMING around each set; the chromosomes are beginning to UNCOIL and lengthen; and the SPINDLE FIBRES are disappearing.
Give the stage AND the visible reasons — the question asks for both, and the reasons must describe what can be SEEN.
Each stage has one unmistakable feature: PROPHASE — chromosomes visible but SCATTERED; nuclear membrane BREAKING DOWN METAPHASE — chromosomes LINED UP at the equator ANAPHASE — chromatids SEPARATED and MOVING to the poles, V or J shaped TELOPHASE — two groups ARRIVED at the poles; nuclear membranes RE-FORMING
TELOPHASE IS PROPHASE IN REVERSE, which makes it easy to recognise and to draw: whatever disappeared in prophase now reappears (nuclear membrane, nucleolus) and whatever formed now dissolves (the spindle).