In a sterile female , Barr body is absent, ovary is underdeveloped. In this female, total number of chromosomes are :-

Options

A. 46
B. 47
C. 45
D. 44

Answer

To solve the question regarding the total number of chromosomes in a sterile female with an absent Barr body and underdeveloped ovaries, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Normal Chromosome Count in Females**:
- Normal females typically have 46 chromosomes, which includes two X chromosomes (XX).

2. **Identify the Condition Described**:
- The question describes a sterile female with an absent Barr body and underdeveloped ovaries. This is indicative of a specific genetic condition.

3. **Recognize the Genetic Condition**:
- The absence of a Barr body suggests that there is only one X chromosome present. In normal females, one X chromosome is inactivated, forming a Barr body. If there is no Barr body, it implies that there is only one X chromosome.

4. **Determine the Chromosome Count in Turner Syndrome**:
- The condition described matches Turner Syndrome, which is characterized by the presence of only one X chromosome (X0). In this case, the total chromosome count is 45 (44 autosomes + 1 X chromosome).

5. **Conclusion**:
- Therefore, the total number of chromosomes in this sterile female is 45.

### Final Answer:
The total number of chromosomes in this sterile female is **45**.

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