Which one is the incorrect match ?

Options

A.
B.
C.
D.

Answer

To determine which option is the incorrect match regarding symbols used in pedigree analysis, we will analyze each option step by step.

### Step 1: Understand the Symbols Used in Pedigree Charts
Pedigree charts use specific symbols to represent individuals and their relationships. The basic symbols include:
- **Circle**: Represents females.
- **Square**: Represents males.
- **Shaded shapes**: Indicate individuals affected by a particular trait or disease.
- **Double lines**: Indicate consanguineous mating (mating between closely related individuals).

### Step 2: Analyze Each Option
- **Option A**: This symbol represents consanguineous mating.
- **Analysis**: Correct. Consanguineous mating is represented by double lines connecting the individuals.

- **Option B**: This shape represents that the sex is unspecified.
- **Analysis**: Correct. A shape that is neither a circle nor a square indicates that the sex is unspecified.

- **Option C**: Circle shape represents a male.
- **Analysis**: Incorrect. A circle represents females, while a square represents males.

- **Option D**: Shaded shapes show that the individuals are affected by a particular disease.
- **Analysis**: Correct. Shaded shapes indicate that the individual has the trait or disease.

### Step 3: Identify the Incorrect Match
From the analysis, we can conclude that:
- The incorrect match is **Option C**, which states that a circle shape represents a male. This is false, as circles represent females.

### Final Answer
The incorrect match is **Option C**.

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