Question

Based on the position of Centromere Chromosome can be divided into 4 types: A. Metacentric: Centromere in the middle B. Submetacentric: Centromere at the end C. Telocentric: Terminal Centromere D. Acrocentric: Centromere is close to middle Choose the correct answer from the options given below:

• A. B and D only \
• B. A and B only \
• C. A and C only \
• D. D and C only

Hint:

Remember the prefixes: "Melo" "Meta" = Middle, "Telo" = Terminal (End). Thus, Metacentric is middle and Telocentric is end.

Answer 1

The Correct Option is C

Step 1: Concept Chromosomes are classified structurally based on the relative position of the centromere, which dictates the lengths of the p (short) and q (long) chromosomal arms.

Step 2: Meaning * Metacentric: Centromere is localized centrally, yielding equal arm lengths. * Submetacentric: Centromere is slightly displaced from the center, creating a slight asymmetry. * Acrocentric: Centromere is severely sub-terminal, producing one extremely short arm. * Telocentric: Centromere is positioned strictly at the terminal end (telomere region).

Step 3: Analysis * Statement A is correct: Metacentric means the centromere sits right in the middle. * Statement B is incorrect: Submetacentric means it is near the middle but slightly off-center, not at the end. * Statement C is correct: Telocentric indicates a terminal centromere located precisely at the tip. * Statement D is incorrect: Acrocentric means the centromere is situated close to one end, yielding one very small arm, not close to the middle.

Step 4: Conclusion Thus, statements A and C are the only completely accurate definitions. Final Answer: (C)