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Telophase

A cell at tel...

Question

A cell at telophase stage is observed by a student in a plant brought from a field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and the cell contains more number of chromosomes as compared to other dividing cells. This would result in

A

Polyteny

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B

Aneuploidy

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C

Polyploidy

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D

Somaclonal variation

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Solution

The correct option is B Polyploidy
When Nuclear membrane and cell plate is not formed in a cell during telophase of mitosis then polyploid cell is formed.

So, the correct answer is 'Polyploidy'.

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Q. A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of the cell plate and thus the cell contains more number of chromosomes as compared to other dividing cells. This would result in:

Q. While performing an experiment, a student observed a cell under the microscope undergoing mitosis is at the telophase stage but not showing any furrow initiation. What can be the possible consequence of this?

Q. Failure of cytokinesis after telophase stage of cell division result in an increase in a whole set of chromosomes in an organism and this phenomenon known as polyploidy is often seen in

Q. While performing an experiment, a student observed that a cell under the microscope undergoing mitosis is at the telophase stage but not showing any furrow initiation. What can be the possible consequence of this?
[1 mark]

Q. A biologist examines a series of cells and counts

160

cells in interphase,

20

cells in prophase,

6

cells in prometaphase,

2

cells in metaphase,

7

cells in anaphase, and

5

cells in telophase. If the complete cell cycle requires

24

hours, what is the average duration of M phase in these cells ?
Stage

Number of cells

Proportion of cells

Average duration

(hours)
Interphase

160 0.80 9.2

20 0.10 2.4

6 0.03 0.72

2 0.01 0.24

7 0.035 0.84

5 0.025 0.6

200 1.0 24

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