Phenotypically females having rudimentary ovaries, underdeveloped breasts, short stture webbing neck , often subnormal intelligence suggests

Options

A. Down 's syndrome
B. Klinefetlter's syndrome
C. Turner 's synderome
D. Haemophilic syndrome

Answer

**Step-by-Step Solution:**

1. **Identify the Symptoms**: The question describes a phenotypically female individual with several specific symptoms: rudimentary ovaries, underdeveloped breasts, short stature, webbing of the neck, and often subnormal intelligence.

2. **Understand the Genetic Basis**: The symptoms suggest a chromosomal abnormality. In this case, the absence of one X chromosome is key. Females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

3. **Recognize the Condition**: The condition characterized by the presence of a single X chromosome (XO) and the absence of the second X chromosome is known as Turner syndrome.

4. **Link Symptoms to Turner Syndrome**:
- **Rudimentary Ovaries**: In Turner syndrome, the ovaries do not develop properly, leading to infertility.
- **Underdeveloped Breasts**: Due to insufficient estrogen production from the underdeveloped ovaries.
- **Short Stature**: Individuals with Turner syndrome often have a shorter height compared to the average population.
- **Webbing of the Neck**: This is a common physical feature associated with Turner syndrome.
- **Subnormal Intelligence**: While many individuals with Turner syndrome have normal intelligence, some may experience learning difficulties.

5. **Differentiate from Other Conditions**: Other genetic conditions mentioned (like Down syndrome, Klinefelter syndrome, and hemophilia) do not present the same combination of symptoms, making Turner syndrome the most fitting diagnosis.

6. **Conclusion**: Based on the symptoms and genetic understanding, the condition described in the question is Turner syndrome.