At the prophase stage of mitosis , the DNA condense and form chromosomes.
Explanation:
The process in which new cells are made order to grow, replenish (repair), and reproduce is called cell division
. The three main types of cell division are binary fission, mitosis, and meiosis.
In prokaryotes like bacteria cell division take place through binary fission, while eukaryotes uses two types of cell division - mitosis (the process of making new body cells like blood, muscle etc ) and meiosis (reproductive cell division that creates egg and sperm cells). In mitosis, a cell is replicated into exact copies of itself and duplicates all of its contents including the chromosomes and splits to form two identical daughter cells. During cell division, cells pass through different phases called cell cycle. During interphase of the cell cycle, which occurs prior to mitosis, there are 3 phases: G1, S, and G2. In the G phases , the organelles are duplicated and the cell grows in size while in the S phase, a duplicate copy of each chromosome is synthesized (DNA replication). After the DNA and organelles are replicated during interphase , the mitosis begins. The first step is prophase where the nuclear envelope surrounding the DNA and the nucleolus disappear and the DNA condenses into chromosomes. During metaphase, the chromosomes lined in the middle of the cell. In anaphase , the chromosomes get separated and move towards opposite sides of the cell. As mitosis proceeds to telophase, the cell forms two nuclear membranes around each set of chromosomes and the chromosomes uncoil. The cell cytoplasm separates, the cell walls then pinch off and split down the middle producing two new daughter cells by a process called cytokinesis or cell cleavage. Cytokinesis takes place during anaphase and telophase.
