Interphase
Let’s begin in the nucleus where genetic information is stored in chromosomes most of a person cells are diploid with two sets of one set is form their mother shown here in red and the other set is from their father shown in blue.
Each maternal chromosome has a corresponding paternal chromosome these matched pairs are called chromosomes during Interphase chromosomes are duplicated each chromosome now consists of two identical copies called sister chromatids zooming in we see that each sister chromatids is made up of DNA wound around histone proteins each strand coils up into a tight helical fiber.