Sex determination ratio in an organism is given by `(X)/(A) = 1.5` , then the organism will be

Options

A. Male
B. Female
C. Super female
D. Intersex

Answer

To determine the type of organism based on the given sex determination ratio of \( \frac{X}{A} = 1.5 \), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Variables**:
- \( X \) represents the number of X chromosomes.
- \( A \) represents the number of autosomes.

2. **Set Up the Equation**:
- The ratio given is \( \frac{X}{A} = 1.5 \).

3. **Identify the Number of Autosomes**:
- In many organisms, including Drosophila (fruit flies), the number of autosomes is typically 2. Therefore, we can set \( A = 2 \).

4. **Calculate the Number of X Chromosomes**:
- Using the ratio \( \frac{X}{2} = 1.5 \), we can solve for \( X \):
\[ X = 1.5 \times 2 = 3 \]
- This means the organism has 3 X chromosomes.

5. **Determine the Type of Organism**:
- In Drosophila, the sex determination mechanism states:
- A normal male has a ratio of \( 0.5 \) (1 X and 2 A).
- A normal female has a ratio of \( 1 \) (2 X and 2 A).
- A super female has more than 2 X chromosomes, which corresponds to a ratio greater than 1.
- Since we have calculated \( X = 3 \) (3 X chromosomes) and \( A = 2 \), the ratio \( \frac{3}{2} = 1.5 \) indicates that this organism is a **super female**.

6. **Conclusion**:
- Therefore, the organism with a sex determination ratio of \( \frac{X}{A} = 1.5 \) will be a **super female**.