The number of chromosomes in ` G_(1)` phase is 36, the number of chromosomes in S phase is

Options

A. 36
B. 18
C. 22
D. 37

Answer

To solve the question regarding the number of chromosomes in the S phase when the number of chromosomes in the G1 phase is given as 36, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Cell Cycle Phases**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions and characteristics.

2. **Identify the G1 Phase**: In the G1 phase, the cell is preparing for DNA replication. The number of chromosomes in this phase is given as 36.

3. **Understand the S Phase**: The S phase is where DNA synthesis occurs. During this phase, the DNA is replicated, meaning that each chromosome is duplicated to form two sister chromatids.

4. **Determine the Chromosome Count in S Phase**: Although the DNA is duplicated in the S phase, the total number of chromosomes does not change. Therefore, if there are 36 chromosomes in the G1 phase, there will still be 36 chromosomes in the S phase, but each chromosome will consist of two sister chromatids.

5. **Conclusion**: The number of chromosomes in the S phase remains the same as in the G1 phase, which is 36.

### Final Answer:
The number of chromosomes in the S phase is **36**.