A human female with turner's syndrome

Options

A. Is able to produce children with normal husband
B. Has 45 chromosomes with XO
C. has one additional X chromosome
D. Exhibits male characters

Answer

**Step-by-Step Solution:**

1. **Understanding Turner Syndrome**: Turner syndrome is a genetic condition that affects females. It is characterized by the absence of one of the two X chromosomes typically found in females. Instead of the usual 46 chromosomes (44 autosomes + 2 sex chromosomes), individuals with Turner syndrome have 45 chromosomes, specifically denoted as 45,X or XO.

2. **Chromosomal Composition**: In a typical female, the chromosomal composition is 46,XX. However, in Turner syndrome, one X chromosome is missing, leading to a chromosomal count of 45, resulting in the notation XO.

3. **Implications of Turner Syndrome**: The absence of one X chromosome leads to various physical and developmental characteristics. Females with Turner syndrome often experience infertility due to non-development of the ovaries, which results in a lack of secondary sexual characteristics such as breast development and menstruation.

4. **Evaluating the Options**:
- **Option A**: "Able to produce children with normal husband" - This is incorrect as Turner syndrome leads to sterility.
- **Option B**: "Has 45 chromosomes with XO" - This is correct as it accurately describes the chromosomal makeup of a person with Turner syndrome.
- **Option C**: "Has one additional X chromosome" - This is incorrect; individuals with Turner syndrome do not have an extra X chromosome.
- **Option D**: "Exhibit male characters" - This is also incorrect; Turner syndrome does not lead to male characteristics.

5. **Conclusion**: Based on the analysis, the correct answer is **Option B**: A human female with Turner syndrome has 45 chromosomes with the configuration XO.

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