Meiosis is characterised by

Options

A. Two nuclear division with chromosomes divide twice
B. Two times nuclear division with chromosome dividing one time
C. Two nuclear division with chromosome dividing four times
D. One nuclear division with chromosome dividing one time

Answer

To answer the question "Meiosis is characterised by," we need to analyze the process of meiosis and its key features. Here’s a step-by-step breakdown of the characteristics of meiosis:

### Step 1: Understanding Meiosis
Meiosis is a specialized type of cell division that reduces the chromosome number by half, resulting in four haploid daughter cells from one diploid parent cell.

### Step 2: Nuclear Division
Meiosis involves two rounds of nuclear division: Meiosis I and Meiosis II.
- **Meiosis I**: This is the reductional division where homologous chromosomes are separated.
- **Meiosis II**: This is similar to mitosis, where sister chromatids are separated.

### Step 3: Chromosome Division
During meiosis, the chromosomes only undergo replication once before the two nuclear divisions occur. This means that while there are two rounds of division, the chromosomes themselves divide only once during the entire process.

### Step 4: Resulting Cells
The end result of meiosis is four genetically diverse haploid cells, each containing half the number of chromosomes as the original diploid cell.

### Conclusion
Thus, meiosis is characterized by two nuclear divisions with chromosomes dividing only once.

### Final Answer
**Meiosis is characterized by two nuclear divisions with chromosomes dividing one time.**

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