In the following karyotype, what is the abnormality seen? Shows 2 X-chromosomes and 1 Y-chromosome.
**Core Concept**
The given karyotype depicts a condition where an individual has an extra X chromosome, which is a type of sex chromosome abnormality. This condition is characterized by an abnormal number of sex chromosomes, leading to various physical and developmental changes.
**Why the Correct Answer is Right**
The correct answer is **Klinefelter syndrome**, which is a genetic condition where males are born with an extra X chromosome, resulting in an XXY karyotype. This condition occurs when there is a non-disjunction error during meiosis, leading to the presence of an extra X chromosome. Individuals with Klinefelter syndrome often exhibit features such as tall stature, infertility, and developmental delays.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a sex chromosome abnormality.
* **Option B:** This option is incorrect because it does not describe a known sex chromosome abnormality.
* **Option C:** This option is incorrect because it does not accurately describe the karyotype seen in the question.
**Clinical Pearl / High-Yield Fact**
Klinefelter syndrome is a sex chromosome abnormality that affects 1 in every 650 males, and it is often associated with infertility, hormonal imbalances, and an increased risk of certain medical conditions.
**Correct Answer: C. Klinefelter syndrome**