Question

Assertion (A): Satellite is a small fragment-like structure found in some chromosomes. 
Reason (R): It is a non-staining secondary construction at a constant location.

• A. A and R are correct. R is the correct explanation of A
• B. A and R are correct. R is not the correct explanation of A
• C. A is correct but R is incorrect
• D. A is incorrect but R is correct

Hint:

Satellite bodies are usually found at specific loci in chromosomes and are related to secondary constrictions.

Answer 1

The Correct Option is A

To solve the problem, we need to analyze the assertion and the reason and check whether the reason correctly explains the assertion.

1. Understanding the Assertion and Reason:
The assertion is about "Satellite" as a small fragment-like structure found in some chromosomes. The reason is that it is a non-staining secondary construction at a constant location.

2. Verifying the Assertion (A):
The assertion is true. Satellites are indeed small, fragment-like structures found in certain chromosomes, typically near the centromere.

3. Verifying the Reason (R):
The reason is also true. Satellites are non-staining secondary constructions at a constant location on chromosomes, usually involved in the formation of nucleolar organizers.

4. Analyzing the Relationship:
The reason provides a correct explanation for the assertion. Satellites are non-staining and located in a fixed position on the chromosomes, which matches the explanation provided by the reason.

Final Answer:
The correct answer is Option A: A and R are correct. R is the correct explanation of A.