Dissolution of the synaptonemal complex occurs during :
| 1. | Zygote | 2. | Diplotene |
| 3. | Leptotene | 4. | Pachytene |
Match the following with respect to meiosis:
| Column-I | Column-II | ||
| (a) | Zygotene | (i) | Terminalization |
| (b) | Pachytene | (ii) | Chiasmata |
| (c) | Diplotene | (iii) | Crossing over |
| (d) | Diakinesis | (iv) | Synapsis |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | iv | iii | ii | i |
| 2. | i | ii | iv | iii |
| 3. | ii | iv | iii | i |
| 4. | iii | iv | i | ii |
Identify the correct statement with regard to phase (Gap 1) of interphase:
| 1. | The reorganisation of all cell components takes place. |
| 2. | The cell is metabolically active and grows but does not replicate its DNA |
| 3. | Nuclear division takes place |
| 4. | DNA synthesis or replication takes place. |
Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called the quiescent stage . This process occurs at the end of:
1.
2. S phase
3.
4. M phase
Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:
| 1. | Anaphase | 2. | Telophase |
| 3. | Prophase | 4. | Metaphase |
In a mitotic cycle, the correct sequence of phases is
1. S, , , M
2. , S, , M
3. M, , , S
4. , , S, M
During Meiosis 1, in which stage synapsis takes place?
| 1. | Pachytene | 2. | Zygotene |
| 3. | Diplotene | 4. | Leptotene |
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. | (i) | (ii) | (iii) | (iv) |
Crossing over takes place between which chromatids and in which stage of the cell cycle?
| 1. | Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. |
| 2. | Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I. |
| 3. | Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I. |
| 4. | Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I. |
After meiosis I, the resultant daughter cells have
| 1. | same amount of DNA as in the parent cell in S |
| 2. | twice the amount of DNA in comparison to haploid |
| 3. | same amount of DNA in comparison to haploid gamete |
| 4. | four times the amount of DNA in comparison to haploid gamete |