1. | Prophase II: | The nuclear membrane disappears by the end of this stage and the chromosomes again become compact. |
2. | Metaphase II: | The chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids. |
3. | Anaphase II: | The homologous chromosomes separate, while sister chromatids remain associated at their centromeres. |
4. | Telophase II: | The two groups of chromosomes once again get enclosed by a nuclear envelope |
Statement I: | The interphase represents the phase between two successive M phases and DNA replication takes place in the interphase. |
Statement II: | The stage between the two meiotic divisions is called interkinesis and there is no replication of DNA during interkinesis. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is correct; Statement II is incorrect |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
Column I | Column II | ||
A | Zygotene | P | Terminalisation of chiasmata |
B | Pachytene | Q | Appearance of chiasmata |
C | Diplotene | R | Crossing over |
D | Diakinesis | S | Pairing of homologues |
A | B | C | D | |
1. | Q | R | P | S |
2. | S | R | Q | P |
3. | Q | S | R | P |
4. | R | S | P | Q |