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प्रश्न
While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice versa?
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उत्तर
Cells with 16 chromosomes are produced by meiosis while that with 32 chromosomes are produced by mitosis.
- Cells with 16 chromosomes could have arisen from cells with 32 chromosomes through meiosis.
- Cells with 32 chromosomes could have arisen from cells with 16 chromosomes through fertilisation or syngamy.
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संबंधित प्रश्न
Distinguish cytokinesis from karyokinesis.
Describe the events taking place during interphase.
Why is mitosis called equational division?
Name the phase of the cell cycle at which the following event occurs:
Crossing over between homologous chromosomes takes place.
Cells in the quiescent stage (Go)
Most cytogenic activities occur during
The centriole undergoes duplication during ______
Mitosis is characterised by ______.
Between a prokaryote and a eukaryote, which cell has a shorter cell division time?
Which of the phases of cell cycle is of longest duration?
Which part of the human body should one use to demonstrate stages in mitosis?
It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle?
Label the diagram and also determine the stage at which this structure is visible.
Mitosis results in producing two cells which are similar to each other. What would be the consequence if the following irregularities occur during mitosis?
Duplication of DNA does not occur
Comment on the statement – Telophase is reverse of prophase.
Name the phase of the cell cycle at which the following event occurs:
Chromosomes are moved to spindle equator.
Name the phase of the cell cycle at which the following event occurs:
Pairing between homologous chromosomes takes place.
