Growth and repair of damaged tissue involve

Growth and the repair of damaged tissues in multicellular organisms are primarily achieved through mitotic cell division. Mitosis is the process by which a somatic (body) cell divides to produce two genetically identical daughter cells, ensuring that the new cells possess the same number of chromosomes as the parent cell [2]. This consistency is vital for maintaining tissue integrity during development and replacing worn-out or injured cells [2]. In contrast, meiosis is a specialized form of cell division dedicated to the production of gametes (sperm and egg cells) for sexual reproduction, resulting in cells with half the genetic material [1]. While amitosis occurs in specific contexts like certain polyploid human cells or abnormal morphologies, it is not the standard mechanism for healthy tissue growth or repair [1]. Therefore, mitosis is the exclusive mechanism for routine somatic growth and regeneration.

Sources

1. [2] https://pmc.ncbi.nlm.nih.gov/articles/PMC11394378/
2. [1] Science , class X (NCERT 2025 ed.) > Chapter 7: How do Organisms Reproduce? > 7.3.1 Why the Sexual Mode of Reproduction? > p. 120