Final answer:
Euchromatin is the chromatin that is actively transcribing DNA.
Step-by-step explanation:
In interphase, eukaryotic chromosomes have two distinct regions: heterochromatin and euchromatin.
Heterochromatin is tightly packaged and usually contains genes that are not expressed, while euchromatin is less dense and contains genes that are actively transcribed.
The DNA in euchromatin is less tightly packed than in heterochromatin, allowing enzymes of replication and transcription easier access to the DNA.
Therefore, euchromatin is the chromatin that is actively transcribing DNA.