A human female with Turner's syndrome.

Options

A. has 45 chromosome with XO.
B. has one additional X chromosome
C. exhibits male characters.
D. is able to produce children with normal husband

Explanation

**Step-by-Step Solution:**

1. **Understanding Turner's Syndrome**: Turner's syndrome is a genetic condition that affects females. It is characterized by the partial or complete absence of one of the two X chromosomes.

2. **Chromosomal Composition**: A typical female has 46 chromosomes, which includes two X chromosomes (XX). In the case of Turner's syndrome, the individual has only one X chromosome and one O (which represents the absence of a second sex chromosome). Therefore, the chromosomal composition is 45 chromosomes in total, denoted as 45,X.

3. **Characteristics of Turner's Syndrome**: Females with Turner's syndrome often exhibit certain physical and developmental traits, such as short stature, delayed puberty, and infertility. They may also have heart defects and other health issues.

4. **Fertility Considerations**: Women with Turner's syndrome typically have underdeveloped ovaries, which leads to a lack of normal ovarian function. As a result, they usually cannot conceive naturally and may require assisted reproductive technologies if they wish to have children.

5. **Conclusion**: Therefore, a human female with Turner's syndrome will have 45 chromosomes (45,X) and will not have a second X chromosome. This condition primarily affects females and has implications for their reproductive health.