The enzyme recombinase is required at which stage of meiosis:

1.	Pachytene	2.	Zygotene
3.	Diplotene	4.	Diakinesis

The complex formed by a pair of synapsed homologous chromosomes is called:

1. Kinetochore

2. Bivalent

3. Axoneme

4. Equatorial plate

During gamete formation, the enzyme recombinase participates during:
1. Metaphase-I
2. Anaphase-II
3. Prophase-I
4. Prophase-II

Cells in ${\mathrm{G}}_0$ phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle

The correct sequence of phases in cell cycle is:

1. ${\mathrm{G}}_1\to \mathrm{S}\to {\mathrm{G}}_2\to \mathrm{M}$

2. $\mathrm{M}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}$

3. ${\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}\to \mathrm{M}$

4. $\mathrm{S}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{M}$

A stage in cell division is shown in the figure. Select the answer which gives the correct identification of the stage with its characteristics:
 

During which phase(s) of the cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C:

Match the following Column-I with Column-II. 

Arrange the following events of meiosis in a correct sequence:
I. Crossing over 
II. Synapsis 
III. Terminalisation of chiasmata 
IV. Disappearance of nucleolus