Which of the following is not true for meiosis

Options

A. Production of genetic variability
B. Maintaining constancy of chromosome number during sexual reproduction
C. Reduction of chromosome number to half
D. Production of diploid cell.

Answer

To determine which statement is not true about meiosis, we need to analyze the characteristics of meiosis carefully. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Definition of Meiosis
Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the production of haploid cells from diploid cells. This process is essential for sexual reproduction.

**Hint:** Remember that meiosis leads to the formation of gametes (sperm and eggs), which are haploid.

### Step 2: Identify the Key Features of Meiosis
1. **Reduction Division**: Meiosis is often referred to as a reductional division because it reduces the chromosome number from diploid (2n) to haploid (n).
2. **Occurs in Germ Cells**: Meiosis occurs in reproductive cells (germ cells), not in somatic (body) cells.
3. **Genetic Variability**: Meiosis introduces genetic variability through processes like crossing over and independent assortment.
4. **Equational Division**: Meiosis consists of two divisions – Meiosis I (reductional) and Meiosis II (equational), where the chromosome number remains the same in Meiosis II.

**Hint:** Focus on the differences between meiosis and mitosis, especially regarding chromosome number and cell types involved.

### Step 3: Evaluate the Options
Now, let’s evaluate the statements provided in the options:
1. **Production of Genetic Variability**: True. Meiosis promotes genetic diversity.
2. **Maintaining Consistency of Chromosome Number**: True. It maintains the diploid chromosome number across generations through sexual reproduction.
3. **Reduction of Chromosome Number into Half**: True. This is a fundamental feature of meiosis.
4. **Production of Diploid Cells**: Not true. Meiosis produces haploid cells, not diploid cells.

**Hint:** Look for statements that contradict the fundamental principles of meiosis.

### Step 4: Conclusion
The statement that is not true about meiosis is the production of diploid cells. Therefore, the correct answer is option number 4.

**Final Answer:** The statement that is not true for meiosis is the production of diploid cells.