Which type of cell division provides an exact duplication of a cell for growth and repair?

Which type of cell division provides an exact duplication of a cell for growth and repair?

• A. Meiosis
• B. Binary Fission
• C. Cytokinesis
• D. Mitosis

Answer: (D)

Exact duplication of a cell for growth and repair is accomplished by mitosis. In mitosis the cell copies its DNA and then equally distributes the duplicated chromosomes into two new nuclei, producing two genetically identical daughter cells. This keeps the chromosome number and genetic information the same, which is essential for tissue growth and replacing damaged cells. After the nuclear division, cytokinesis splits the cytoplasm to form two separate cells, completing the division. Meiosis reduces the chromosome number to make gametes and introduces genetic variation, not identical copies for growth. Binary fission occurs in bacteria as a simple division, and cytokinesis is just the cytoplasmic split that follows division, not the DNA duplication itself.

Exact duplication of a cell for growth and repair is accomplished by mitosis. In mitosis the cell copies its DNA and then equally distributes the duplicated chromosomes into two new nuclei, producing two genetically identical daughter cells. This keeps the chromosome number and genetic information the same, which is essential for tissue growth and replacing damaged cells. After the nuclear division, cytokinesis splits the cytoplasm to form two separate cells, completing the division. Meiosis reduces the chromosome number to make gametes and introduces genetic variation, not identical copies for growth. Binary fission occurs in bacteria as a simple division, and cytokinesis is just the cytoplasmic split that follows division, not the DNA duplication itself.