The centriole undergoes duplication during:
1. | Metaphase | 2. | G2 phase |
3. | S-phase | 4. | Prophase |
Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
1. Diakinesis
2. Pachytene
3. Leptotene
4. Zygotene
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. | Coiling and condensation of chromatids |
2. | Spindle fibres attach to Kinetochores of chromosomes |
3. | Movement of centrioles towards opposite poles |
4. | Pairing of homologous chromosomes |
1. | Four haploid cells are formed at the end of Meiosis-II. |
2. | There are two stages in Meiosis, Meiosis-I and II. |
3. | DNA replication occurs in S phase of Meiosis-II. |
4. | Pairing of homologous chromosomes and recombination occurs in Meiosis-I. |
1. | Splitting of centromere occurs at anaphase. |
2. | All the chromosomes lie at the equator at metaphase. |
3. | Spindle fibres attach to centromere of chromosomes. |
4. | Chromosomes decondense at telophase |