Choose the correct answer from the options given below: 

The centriole undergoes duplication during:

The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G₁ phase is 8, what would be the number of chromosomes after the S phase? 

1. 4

2. 32

3. 8

4. 16

Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called the quiescent stage $\left(G_0\right)$. This process occurs at the end of:

1.  $G_1$ $phase$

2.  S phase

3.  $G_2$ $phase$

4.  M phase 

Identify the correct statement with regard to $G_1$ phase (Gap 1) of interphase:

Match the following events that occur in their respective phases of cell cycle and select the correct option:

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