Cell Cycle and Cell Division Question 44
44. Select the correct option :
[2015 RS]
| | I | | II |
| :—: | :— | :—: | :—: |
| A | Synapsis aligns
homologous chromosomes | (i) | Anaphase-II |
| B | Synthesis of RNA and
protein | (ii) | Zygotene |
| C | Action of enzyme
recombinase | (iii) | G2-phase |
| D | Centromeres do not
separate but chromatids
move towards opposite
poles | (iv) | Anaphase-I |
| :—: | :— | :—: | :— |
| | | (v) | Pachytene |
A $\quad$ B $\quad$ C $\quad$ D
| (a) | (ii) | (iii) | (v) | (iv) |
| :— | :— | :— | :— | :— |
| (b) | (i) | (ii) | (v) | (iv) |
| (c) | (ii) | (iii) | (iv) | (v) |
| (d) | (ii) | (i) | (iii) | (iv) |
49. Choose the correct option for the following events of meiosis in correct sequence:
(A) Crossing over
[2015 RS]
(B) Synapsis
(C) Terminalisation of chiasmata
(D) Disappearance of nucleolus
Show Answer
Answer : a
Hints & Solutions
(a) Pachytene - Crossing over mediated by recombinase enzyme. Zygotene - Pairing of homologous chromosomes $G_2$ phase - Synthesis of RNA and protein Anaphase I - Centromeres do not separate but chromatids move towards opposite poles.
