The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?
1. | 4 | 2. | 32 |
3. | 8 | 4. | 16 |
Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
1. Diakinesis
2. Pachytene
3. Leptotene
4. Zygotene
The centriole undergoes duplication during:
1. | Metaphase | 2. | G2 phase |
3. | S-phase | 4. | Prophase |
Match List-I with List-II
List-I | List-II | ||
(a) | S phase | i. | Proteins are synthesized |
(b) | G2 phase | ii. | Inactive phase |
(c) | Quiescent stage | iii. | Interval between mitosis and initiation of DNA replication |
(d) | G1 phase | iv. | DNA replication |
Choose the correct answer from the options given below:
Options: | (a) | (b) | (c) | (d) |
1. | iv | i | ii | iii |
2. | ii | iv | iii | i |
3. | iii | ii | i | iv |
4. | iv | ii | iii | i |
Which of the following stages of meiosis involves division of centromere?
1. Anaphase II
2. Telophase II
3. Metaphase I
4. Metaphase II
Match the following events that occur in their respective phases of cell cycle and select the correct option:
Column I | Column II | ||
(a) | G1 phase | (i) | Cell grows and organelle duplication |
(b) | S phase | (ii) | DNA replication and chromosome duplication |
(c) | G2 phase | (iii) | Cytoplasmic growth |
(d) | Metaphase in M-phase | (iv) | Alignment of chromosomes |
Options: | (a) | (b) | (c) | (d) |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (iii) | (ii) | (i) | (iv) |
During Meiosis 1, in which stage synapsis takes place?
1. | Pachytene | 2. | Zygotene |
3. | Diplotene | 4. | Leptotene |
Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:
1. | Anaphase | 2. | Telophase |
3. | Prophase | 4. | Metaphase |
1. | the cell plate that represents the middle lamella |
2. | the cell plate that represents the primary cell wall |
3. | the cleavage furrow that represents the middle lamella |
4. | the contractile ring that represents the primary cell wall |