NEETBotanyCell - The Unit of Life
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In an acrocentric chromosome, the centromere is situated at the terminal position. Reason (R): Acrocentric chromosomes possess one extremely short p-arm and one very long q-arm. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
D. (A) is not correct but (R) is correct
Step-by-step solution
The Assertion (A) is incorrect because a chromosome with a terminal centromere is known as a telocentric chromosome, not an acrocentric chromosome. An acrocentric chromosome has its centromere situated close to its end. The Reason (R) is correct as the position of the centromere close to the end in an acrocentric chromosome results in the formation of one extremely short arm (p-arm) and one very long arm (q-arm). Therefore, (A) is not correct but (R) is correct. Answer: (A) is not correct but (R) is correct