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प्रश्न
Discuss with your teacher about some haploid cells in higher plants where cell-division does not occur.
उत्तर
- The phenomenon of polyploidy can be observed in some haploid cells in higher plants in which cell division does not occur.
- Polyploidy is a state in which cells contain more pairs of chromosomes than the basic set.
- Polyploidy can be artificially induced in plants by applying colichine to cell culture.
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संबंधित प्रश्न
Discuss with your teacher about haploid insects and lower plants where cell-division occurs.
Can there be DNA replication without cell division?
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:
Lumen, muscular tissue, connective tissue, pericardium
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The connecting link between Meiosis-I and Meiosis-II is ______.
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How many meiotic divisions are necessary for the formation of 80 sperms?
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In which of the following phase of mitosis chromosomes are arranged at the equatorial plane?
Choose the correct option.
Find incorrect statement.
Match the following column A with column B.
| Column-A (phases) |
Column-B (Their events) |
| a. Leptotene | 1. Crossing over |
| b. Zygotene | 2. Desynapsis |
| c. Pachytene | 3. Synapsis |
| d. Diplotene | 4. Bouquet stage |
Centromere is required for ______.
Colchicine prevents the mitosis of the cells at which of the following stage______.
Differentiate between mitosis and meiosis.
Write about Pachytene of Prophase I.
Write about Pachytene and Diplotene of Prophase I
If a tissue has at a given time 1024 cells, how many cycles of mitosis had the original parental single cell undergone?
An anther has 1200 pollen grains. How many pollen mother cells must have been there to produce them?
Name the pathological condition when uncontrolled cell division occurs.
