Meiosis (AHL)
Meiosis (AHL): Overview
This Topic covers sub-topics such as Homologous Chromosomes, Crossing Over, Chiasmata, Bivalent, Interkinesis, Second Meiotic Division, Prophase-I, First Meiotic Division, Metaphase-I, Anaphase-I, Prophase-II, Anaphase-II, Metaphase-II and, Telophase-II
Important Questions on Meiosis (AHL)
Is bivalent same as homologous chromosomes?
What does prophase II do in meiosis?
What key event occurs in anaphase II?
What three things happen during telophase II?
What happens after cytokinesis in meiosis?
Interkinesis is the longest period of meiosis.
Match the given columns and choose the correct option:
| column | column | ||
| (A) | Zygotene | (i) | Formation of recombination nodule |
| (B) | Diakinesis | (ii) | Synapsis |
| (C) | Diplotene | (iii) | Dissolution of the synaptonemal complex |
| (D) | Pachytene | (iv) | Terminalisation of chiasmata |
Write a note on crossing over.
At which stage of meiosis does the genetic constitution of gametes is finally decided?
Match column I and column II and select the correct answer using the codes.
| Column I (Phase of meiosis) |
Column II (Event that occurs) |
| A. Prophase I | 1. Crossing over occurs |
| B. Metaphase II | 2. Sister chromatids migrate to opposite poles. |
| C. Anaphase I | 3. Homologous line up at equator in pairs. |
Match the stage in column I with the diagram in column II and choose the correct answer.
| Column I | Column II | ||
| A | Anaphase | 1 |  |
| B | Prophase | 2 |  |
| C | Telophase | 3 |  |
| D | Metaphase | 4 |  |
Match the sub stage of prophase I of meiosis in column I and the events in column II and choose the right options:
| Column I | Column II |
| A. Leptotene | 1. Terminalization of chiasma |
| B. Zygotene | 2. Crossing over and recombination |
| C. Pachytene | 3. Synapsis |
| D. Diakinesis | 4. Visibility of chromosomes |
