Wiktionary
euchromatin
n. (context genetics English) uncoiled dispersed threads of chromosomal material that occurs during interphase; it stains lightly with basic dyes
Wikipedia
Euchromatin
Euchromatin is a lightly packed form of chromatin (DNA, RNA and protein) that is enriched in genes, and is often (but not always) under active transcription. Euchromatin comprises the most active portion of the genome within the cell nucleus. 92% of the human genome is euchromatic. The remainder is called heterochromatin.
Usage examples of "euchromatin".
Ultraviolet gives us hereditary mutation and the euchromatin contains the genes that transmit heredity.