 However, sexual reproduction involving meiosis is also a primitive characteristic of eukaryotes.Thus meiosis and mitosis may both have evolved, in parallel, from ancestral prokayotic processes.While in bacterial cell division, after duplication of DNA, two circular chromosomes are attached to a special region of the cell membrane, eukaryotic mitosis is usually characterized by the presence of many linear chromosomes, whose kinetochores attaches to the microtubules of the spindle.