euchromatic

/ˌjukrəˈmætɪk/
adjective
  1. Relating to or having the normal, gene-rich parts of a chromosome that are active in transcription.
    • Euchromatic regions of DNA contain most of the actively expressed genes.
    • The scientist studied how euchromatic areas differ from heterochromatic ones.
    • Changes in euchromatic structure can affect gene activity.