Select the option that shows the correct number of chromosomes in the meiocytes.

Options

A. Maize - 20
B. Pisum sativum - 7
C. Ophioglossum - 630
D. Potato - 24

Answer

To solve the question regarding the correct number of chromosomes in meiocytes, let's break it down step by step:

### Step 1: Understanding Meiocytes
- Meiocytes are specialized cells that undergo meiosis to produce gametes (sperm and eggs).
- The number of chromosomes in meiocytes is typically half of the diploid number, which is the total number of chromosomes in somatic cells.

### Step 2: Analyzing the Options
- We need to evaluate the given options to determine the correct number of chromosomes in meiocytes for each organism.

### Step 3: Evaluating Each Option
1. **Option 1: Maize (Zea mays)**
- The diploid number of chromosomes in maize is 20.
- Therefore, the number of chromosomes in meiocytes (haploid) = 20/2 = 10.
- This option is incorrect as it states 20 for meiocytes.

2. **Option 2: Pisum sativum (Pea Plant)**
- The diploid number of chromosomes in Pisum sativum is 14.
- Therefore, the number of chromosomes in meiocytes = 14/2 = 7.
- This option is correct as it states 7 for meiocytes.

3. **Option 3: Ophioglossum**
- Ophioglossum is known for having a very high chromosome count, with some species having up to 1260 chromosomes.
- Therefore, the number of chromosomes in meiocytes would be 1260/2 = 630.
- This option is incorrect.

4. **Option 4: Potato (Solanum tuberosum)**
- The diploid number of chromosomes in potato is 24.
- Therefore, the number of chromosomes in meiocytes = 24/2 = 12.
- This option is incorrect as it states 12 for meiocytes.

### Step 4: Conclusion
- After evaluating all options, the only correct option regarding the number of chromosomes in meiocytes is **Option 2: Pisum sativum with 7 chromosomes.**

### Final Answer
The correct answer is **Option 2: Pisum sativum (7 chromosomes in meiocytes).**

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