Which one of the following symbols and its representation, used in human pedigree analysis is correct

Options

A.
B.
C.
D.

Answer

To solve the question regarding the correct symbol and representation used in human pedigree analysis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Symbols Used in Pedigree Analysis**:
- In human pedigree analysis, males are represented by squares (□) and females by circles (○).
- An affected individual (one who has the trait being studied) is represented by a filled shape (colored).
- A carrier (an individual who carries the trait but does not express it) is represented by a shape with a dot (a circle with a dot for females or a square with a dot for males).
- A non-specified gender or transgender individual is represented by a diamond (♦).

2. **Identify Relationships**:
- A single line connecting a male and female indicates a simple marriage (unrelated individuals).
- A double line indicates a consanguineous marriage (marriage between relatives).

3. **Analyze Each Option**:
- Evaluate the options given in the question based on the symbols and their meanings.
- Check if the shapes are correctly represented as male or female and if they are filled or not to indicate affected or unaffected status.

4. **Select the Correct Option**:
- After analyzing the options, identify which one accurately represents the symbols and relationships as per the rules of pedigree analysis.

5. **Conclusion**:
- The correct representation will be the one that follows all the conventions of pedigree analysis without any discrepancies.