Given diagram represents a stage during mitotic cell division in an animal cell. Examine it carefully and answer the questions which follow. [5 MARKS]
(a) Identify the stage. Give one reason in support of your answer.
(b) Name the cell organelle that forms the 'aster'.
(c) Name the parts labeled 1,2 and 3.
(d) Name the stage that follows the one shown here. How is that stage identified?

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Solution

a) 1 Mark
b) 1 Mark
c) 2 Marks
d) 1 Mark

(a) The stage of mitotic cell division is Late Prophase because nuclear membrane is disappearing and chromatin fibres have condensed into chromosomes.
(b) Centrosome forms aster.
(c)
1 - Centromere
2 - Chromatid
3 - Spindle fibres
(d) Metaphase: This stage is identified by the arrangement of chromosomes on the equatorial plane of the cell with each chromosome getting attached to a spindle fibre by its centromere.

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