If the DNA content of an onion tip cell is 2C at the end of the M-phase, what would be its DNA content at the end of the S-phase?

1. C

2. 2C

3. 3C

4. 4C

In oocyte of some vertebrates, the stage of meiosis I that can last for months or years would be:

1. Zygotene

2. Pachytene

3. Diplotene

4. Diakinesis

When a cell stops growing, say due to shortage of nutrients, this will occur in which phase of the cell cycle?

1. ${\mathrm{G}}_0$

2. ${\mathrm{G}}_1$

3. S

4. ${\mathrm{G}}_2$

The following cell undergoing mitosis, is at:
   

Which of the following options gives the correct sequences of events during mitosis?

During cell growth, DNA synthesis takes place in

1. S-phase                       
2. ${\mathrm{G}}_1$-phase
3. ${\mathrm{G}}_2$-phase                     
4. M-phase 

Which of the following is not a characteristic feature during mitosis in somatic cells
1. Disappearance of nucleolus

2. Chromosome movement

3. Synapsis

4. Spindle fibres

Spindle fibres attach on to 

In meiosis crossing over is initiated at 

1. leptotene

2. Zygotene

3. diplotene

4. pachytene

Arrange the following events of meiosis in correct sequences

1. II, I, IV, III
2. II, I, III, IV
3. I, II, III, IV
4. II, III, IV, I