In the process of meiosis, there are two sequential cycles of nuclear and cell division. How many cycles of DNA replication are required in meiosis ?

Options

A. one
B. Four
C. Two
D. No replication process

Answer

To determine how many cycles of DNA replication are required in meiosis, we can follow these steps:

### Step 1: Understand the Process of Meiosis
Meiosis consists of two sequential divisions: Meiosis I and Meiosis II. Each of these divisions involves various stages, including prophase, metaphase, anaphase, and telophase.

**Hint:** Remember that meiosis is a two-part process that reduces the chromosome number by half.

### Step 2: Identify the Role of DNA Replication
DNA replication occurs during the S phase of the cell cycle. This is the phase where the DNA is duplicated before the cell enters meiosis.

**Hint:** Recall that DNA replication is crucial for ensuring that each daughter cell receives the correct amount of genetic material.

### Step 3: Determine When DNA Replication Occurs
In meiosis, DNA replication only occurs once during the S phase before the start of Meiosis I. After this replication, the cell undergoes two rounds of division (Meiosis I and Meiosis II) without any further DNA replication.

**Hint:** Think about how many times the DNA needs to be copied to ensure that each resulting cell has the correct genetic information.

### Step 4: Conclusion
Since DNA replication occurs only once during the S phase before Meiosis I, the answer to the question is that only **1 cycle of DNA replication** is required in meiosis.

**Final Answer:** 1