Chromosome puffs

Definition

Localized swellings or enlargements of a chromosome, often associated with active gene transcription.

Etymology

Example

Chromosome puffs are readily observed in the salivary glands of dipteran insects during periods of high transcriptional activity.

Related Terms

• Gene expression
• Transcription
• Polytene chromosomes

Usage Notes

The size and number of chromosome puffs can vary depending on the developmental stage and physiological state of the organism.