Q. Which one of the following techniques is employed in human genetic counselling ?

Options

A. a) Serological technique
B. b) Polyploidy
C. c) Pedigree analysis
D. d) Amniocentesis

Answer

To answer the question "Which one of the following techniques is employed in human genetic counselling?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Genetic Counseling**: Genetic counseling is a process that helps individuals understand genetic conditions and the risks of inherited diseases. It often involves analyzing genetic information and family history.

2. **Analyzing the Options**:
- **Option A: Serological Technique**: This technique is primarily used for diagnosing immune deficiencies and is not specifically related to genetic counseling.
- **Option B: Polyploidy**: This term refers to the condition of having multiple sets of chromosomes. While it is a genetic concept, it is not a technique used in genetic counseling.
- **Option C: Pedigree Analysis**: This is a method used to track the inheritance of traits across generations in a family. It helps in understanding the genetic history and risks of genetic disorders, making it a key technique in genetic counseling.
- **Option D: Amniocentesis**: This is a procedure used to obtain amniotic fluid for genetic testing of a fetus. While it is related to genetics, it is more of a diagnostic procedure rather than a counseling technique.

3. **Conclusion**: Based on the analysis, the technique that is specifically employed in human genetic counseling is **Option C: Pedigree Analysis**.

### Final Answer:
**C. Pedigree Analysis**

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