摘要: Publisher Summary This chapter discusses the significance of sex chromatin. Several morphological aspects chromatin are interest, especially when one bears in mind that this chromocenter is a single X chromosome condensed or positively heteropycnotic state. The following account refers to cells females. In males, occasional nuclei contain particles mimic chromatin, but there no regularity pattern and chromocenters question probably represent regions autosomes. focuses on possible genetic heteropycnosis two chromosomes somatic It seems reasonable synthesis release messenger RNA would be suppressed region tightly coiled compact. While per se significant as useful cytological marker tests used clinical diagnostic aids, its true biological sense lies derivation. staining properties human tissues other animals, derivation