If the chromosome number of a trisomic is 25 what will be its corresponding 3n number

Options

A. 48
B. 36
C. 39
D. 37

Explanation

To solve the question, "If the chromosome number of a trisomic is 25, what will be its corresponding 3n number?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Trisomic":**
- Trisomy refers to a condition where there are three copies of a particular chromosome instead of the normal two. This means that in a trisomic organism, the total chromosome number can be expressed as \(2n + 1\), where \(n\) is the haploid number (the number of chromosomes in a gamete).

2. **Set Up the Equation:**
- Given that the chromosome number of the trisomic is 25, we can set up the equation:
\[ 2n + 1 = 25 \]

3. **Solve for \(n\):**
- Rearranging the equation to find \(n\):
\[ 2n = 25 - 1 \]
\[ 2n = 24 \]
\[ n = \frac{24}{2} = 12 \]

4. **Calculate the 3n Number:**
- Now that we have \(n\), we can find \(3n\):
\[ 3n = 3 \times 12 = 36 \]

5. **Conclusion:**
- Therefore, the corresponding 3n number is 36.

### Final Answer:
The corresponding 3n number is **36**.

---