Which is the ecample of chromosomal disorder ?
A. Tumer's syndrome
B. Down's syndrome
C. Klineflter's syndrome
D. None of the above

Options

A. A,C,D
B. A,B,C,D
C. B,C,D
D. A,B,C

Answer

To determine which of the options represents a chromosomal disorder, let's analyze each option step by step:

### Step 1: Understand Chromosomal Disorders
Chromosomal disorders are conditions that arise due to abnormalities in chromosome number or structure. These can include missing chromosomes, extra chromosomes, or structural changes in chromosomes.

### Step 2: Analyze Each Option
- **A. Turner’s Syndrome**: This disorder occurs when a female is missing one of her X chromosomes, resulting in a genotype of 44 + X0 (where X0 indicates the absence of one X chromosome). This is indeed a chromosomal disorder.

- **B. Down’s Syndrome**: This condition is caused by Trisomy 21, where there are three copies of chromosome 21 instead of the usual two. This results in a total of 47 chromosomes (46 + 1). This is also classified as a chromosomal disorder.

- **C. Klinefelter’s Syndrome**: This syndrome occurs in males who have an extra X chromosome, resulting in a genotype of 44 + XXY. This condition is also a chromosomal disorder.

### Step 3: Conclusion
All three options (Turner’s Syndrome, Down’s Syndrome, and Klinefelter’s Syndrome) are examples of chromosomal disorders. Therefore, the correct answer to the question is that all of the above (A, B, and C) are examples of chromosomal disorders.

### Final Answer
**The answer is: A. Turner’s syndrome, B. Down’s syndrome, C. Klinefelter’s syndrome.**