Biology
Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the questions that follow:
(a) Is it a plant cell or an animal cell? Give a reason to support your answer.
(b) Identify the stage shown.
(c) Name the stage that follows the one shown here. How is that stage identified?
(d) How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cells?
(e) Draw a duplicated chromosome and label its parts.
Cell Division
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Answer
(a) It is a plant cell because centrioles are not shown in the diagram.
(b) The stage shown is Prophase.
(c) Metaphase follows Prophase. In Metaphase, Chromosomes line up in one plane at equator.
(d) In Mitosis, full set of chromosomes is passed on to each daughter cell. This is the diploid (2n) number of chromosomes whereas in Meiosis, only half the number of chromosomes is passed on to each daughter cell. This is the haploid (n) number of chromosomes.
(e) Below is the labelled diagram of a duplicated chromosome:
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Related Questions
The diagram given below represents a certain phenomenon which occurs during meiosis. Name and explain the phenomenon by using the terms - homologous chromosomes, chromatids, and crossing-over.
Given below is a diagram representing a stage during mitotic cell division in an animal cell. Examine it carefully and answer the questions which follow.
(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 labelled 1, 2 and 3.
(d) Name the stage that follows the one shown here. How is that stage identified?
(e) Mention two points of difference between mitosis and meiosis with regard to:
- The number of daughter cells produced.
- The chromosome number in the daughter cells.
Given below are three diagrammatic sketches (A, B and C) of one and the same particular phase during mitotic type of cell division.
(a) Identify the phase.
(b) What is the diploid number of chromosomes shown in them?
(c) Identify whether these are animal cells or plant cell? Give reasons.
Shown below are four stages (A, B, C, D) (not in sequence) of a certain kind of cell division.
(a) Is it a plant cell or an animal cell? Give two reasons.
(b) Is it undergoing mitosis or meiosis?
(c) What should be the correct sequence of these four stages among themselves?
(d) Name the stage that should precede the earliest of these stages.
(e) Draw the stage named above inside the blank space provided.