isopyknosis

noun

iso·​pyk·​no·​sis

variants also isopycnosis

ˌī-sō-pik-ˈnō-səs 

: the quality or state of some chromosomes or of parts of some chromosomes in a nucleus of staining uniformly and being coiled to the same degree compare heteropyknosis

isopyknotic adjective

also isopycnotic

-ˈnät-ik