Two chromosomes are examined. Chromosome X has two equal arms, while chromosome Y has its centromere at the terminal end
A metacentric chromosome has a centrally positioned centromere and two equal arms. A telocentric chromosome has a terminal centromere. Classification therefore requires relating arm lengths to centromere position.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Cytoskeleton Cilia Flagella Centrosome Nucleus and Chromosomes
