Here's why:

* Tetrads are structures formed during meiosis, specifically in Prophase I. They consist of two homologous chromosomes, each made up of two sister chromatids, paired together.

* Mitosis is a process of cell division that produces two identical daughter cells. It does not involve the pairing of homologous chromosomes or the formation of tetrads.

Instead of tetrads, mitosis involves the duplication of chromosomes and their separation into two identical sets, ensuring that each daughter cell receives a complete copy of the genetic material.