heterochromatin

详细解释:【医】 异染色质

详细解释：

het.er.o.chro.ma.tin

n.（名词）
Tightly coiled chromosomal material that stains deeply during interphase and is believed to be genetically inactive.
异染色质：紧紧盘绕在一起的染色体物质，在分裂期间染色，据信在基因中并不活跃