Step 1: Understanding the Concept:
Chromosomes are classified into structural types based on the position of the centromere, which dictates the relative lengths of their arms during cell division.
Step 2: Detailed Explanation:
- Telocentric: The centromere is located at the absolute end of the chromosome, giving it a single visible arm. During anaphase, telocentric chromosomes assume a rod-like ("I") shape.
- Acrocentric: The centromere is located near the end, producing one extremely short arm (p arm) and one long arm (q arm).
- Metacentric: The centromere is positioned in the middle, creating two arms of equal length and forming a "V" shape during anaphase.
- Submetacentric/Subterminal: The centromere is slightly off-center, producing unequal arms and an "L" or "J" shape.
Step 3: Final Answer:
A chromosome with its centromere at the terminal end is telocentric.