Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both are true but reason is not correct explanation (B), assertion is true but reason is wrong ( C) and both are wrong (D).
Assertion. In a pedigree analysis,a circle represents unaffected offspring.
Reason. In the pedigree analysis, the offspring are numbered with arabic numerals (1,2,3...) and generation is numbered with roman numerals

Options

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

Answer

To solve the question regarding the assertion and reason, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
**Assertion:** In a pedigree analysis, a circle represents unaffected offspring.

- In pedigree analysis, circles are used to represent females, while squares represent males. The color of the shape indicates whether the individual is affected or unaffected by a particular trait or disease. Specifically, an unaffected individual is represented by a simple (unshaded) circle or square. Therefore, the assertion is **true** because a circle can represent an unaffected female.

### Step 2: Analyze the Reason
**Reason:** In the pedigree analysis, the offspring are numbered with Arabic numerals (1, 2, 3...) and generations are numbered with Roman numerals.

- This statement is also true. In pedigree charts, individuals within a generation are indeed numbered using Arabic numerals, while the generations themselves are labeled using Roman numerals (I, II, III, etc.).

### Step 3: Determine the Relationship Between Assertion and Reason
- While both the assertion and reason are true, the reason does not explain why a circle represents unaffected offspring. The reason discusses the numbering system used in pedigree analysis but does not relate to the representation of affected versus unaffected individuals.

### Conclusion
- Since both the assertion and reason are true, but the reason does not correctly explain the assertion, the correct option is **B**: both are true but the reason is not the correct explanation.

### Final Answer
**B**: Both are true but reason is not the correct explanation.

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