👉 In genetics, "idiochromatin" refers to a type of chromatin structure that is found in eukaryotic cells. It consists of two types of nucleosomes (small nuclear bodies) arranged in a helical pattern on the chromosome's surface. These structures are responsible for regulating gene expression and are essential for the maintenance of cell homeostasis. The term "idiochromatin" comes from the Latin word "idiom" meaning "one who is one." In genetics,