Chromosome Components

Several structural features are important for chromosome identification and function:

• Centromere: A specialized chromosome region that supports kinetochore formation and the attachment of chromosomes to the spindle during cell division.
• Telomeres: Repetitive DNA sequences and associated proteins that protect chromosome ends and contribute to genome stability.
• Chromosome arms: The short arm, designated p, and the long arm, designated q, are separated by the centromere.
• Replication origins: Genomic sites where DNA replication begins.
• Genes and regulatory sequences: DNA regions that encode functional products or regulate gene expression.