Give the example of X- monosomy you have studied.

Answer

### Step-by-Step Solution:

1. **Understanding X-Monosomy**:
- X-monosomy refers to the condition where an individual has only one X chromosome instead of the normal two sex chromosomes (XX in females). This condition is also known as Turner’s syndrome.

2. **Example of X-Monosomy**:
- The most common example of X-monosomy is Turner’s syndrome. In this condition, a female is born with only one X chromosome, which is represented as XO in the karyotype notation.

3. **Characteristics of Turner’s Syndrome**:
- Individuals with Turner’s syndrome exhibit a variety of physical and developmental symptoms due to the absence of one X chromosome. Some of these characteristics include:
- Short stature (low height)
- Small mandible (jaw)
- High arched palate (the roof of the mouth)
- Low set ears
- Webbed neck (extra skin folds on the neck)
- Low hairline
- Minimal breast development
- Ovarian dysfunction, which can lead to amenorrhea (absence of menstruation) and infertility.

4. **Conclusion**:
- Turner’s syndrome is a clear example of X-monosomy, characterized by the presence of a single X chromosome and a range of associated physical and reproductive symptoms.