What is true for mitosis ?

Options

A. It has two divisions
B. It maintans number of chromosomes
C. It occurs in somatic cells only
D. It occurs in somatic cells as well as gonads

Explanation

To determine what is true for mitosis, we will analyze the characteristics and functions of mitosis step by step.

### Step-by-Step Solution:

1. **Definition of Mitosis**: Mitosis is a type of cell division that results in two genetically identical daughter cells from a single parent cell. It is essential for growth, repair, and asexual reproduction in organisms.

2. **Chromosome Number Maintenance**: During mitosis, the number of chromosomes is maintained. Before mitosis begins, the cell undergoes DNA replication during the S phase of the cell cycle, resulting in two copies of each chromosome (sister chromatids). When the cell divides, each daughter cell receives one copy of each chromosome, thus maintaining the original chromosome number.

3. **Types of Cells Involved**: Mitosis occurs primarily in somatic (body) cells. Somatic cells are all the cells in the body except for the germ cells (gametes). Therefore, mitosis does not occur in the production of gametes (sperm and eggs), which is achieved through a different type of cell division called meiosis.

4. **Occurrence in Gonads**: Although mitosis occurs in somatic cells, it can also occur in the gonads (testes and ovaries) for the purpose of producing gametes. However, the actual formation of gametes involves meiosis, not mitosis.

5. **Conclusion**: Based on the analysis, the statement that is true for mitosis is that it occurs in somatic cells. Therefore, the correct option is that mitosis occurs in somatic cells only.

### Final Answer:
Mitosis occurs in somatic cells only.