Chromosome material that does not stain strongly except during cell division. It represents the major genes and is involved in transcription. Compare with heterochromatin.
- This can be expected, since different chromosomes in a genome can have different organizations of genes, euchromatin, and heterochromatin.
- The wavy line represents euchromatin of chromosome 2.
- Position-effect variegation results from the juxtaposition of euchromatin and heterochromatin by chromosome rearrangement or transposon insertion.
- Example sentences
- This is due, in part, to the presence of large, complex blocks of duplicated genomic sequence at the boundary between centromeric satellite and unique euchromatic DNA.
- In Drosophila, relocation of a euchromatic gene near centromeric or telomeric heterochromatin often leads to its mosaic silencing.
- Numerous genes act to remodel and repress chromatin in heterochromatin and around euchromatic genes during development.
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