Advertisements
Advertisements
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?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
What is the average cell cycle span for a mammalian cell?
Describe the events taking place during interphase.
What is G0 (quiescent phase) of cell cycle?
Why is mitosis called equational division?
Most cytogenic activities occur during
The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of Mitosis if the number of chromosomes in G1 phase is 8, what would be the number of chromosomes after the S phase?
The centriole undergoes duplication during ______
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 tissue of animals and plants exhibits meiosis?
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?
Two key events take place, during S phase in animal cells, DNA replication and duplication of centriole. In which parts of the cell do events 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.
Following are the stages of cell division:
- Gap 2 phase
- Cytokinesis
- Synthesis phase
- Karyokinesis
- Gap 1 phase
Choose the correct sequence of stages from the options given below:
Statement I: During GO phase of cell cycle, the cell is metabolically inactive.
Statement II: The centrosome undergoes duplication during S phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below:
