Biology
Study the diagram given below which represents a stage during the mitotic cell division and answer the questions that follow:
(i) Identify the stage giving suitable reasons.
(ii) Name the parts numbered 1 and 2.
(iii) What is the technical term for the division of nucleus?
(iv) Mention the stage that comes before the stage shown in the diagram. Draw a neat labelled diagram of the stage mentioned.
(v) Which is the cell division that results in half the number of chromosomes in daughter cells?
Cell Division
ICSE 2017
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Answer
(i) The stage shown in the diagram is telophase. During telophase, the mitotic spindle disappears, the chromosomes uncoil and two sets of daughter chromosomes reach opposite poles and the nuclear envelope reforms.
(ii) Part numbered 1 and 2 are:
- 1 → Daughter chromosome
- 2 → Nuclear membrane.
(iii) The technical term for the division of nucleus is Karyokinesis.
(iv) The stage that comes before this stage is Anaphase. It's labelled diagram is shown below:
(v) Meiosis is a type of cell division that results in half the number of chromosomes in daughter cells.
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