Which of the following statements is true about mitosis?

Mitosis is a fundamental process in cell division that leads to the growth and repair of tissues in multicellular organisms. During mitosis, a single cell divides to produce two genetically identical daughter cells, each having the same number of chromosomes as the original cell. This process is crucial for organismal development, healing wounds, and replacing damaged or dead cells.

In contrast, the other statements do not accurately describe mitosis. For instance, halving the chromosome number is a characteristic of meiosis, which is the type of cell division involved in producing gametes for sexual reproduction. Genetic variability is also a hallmark of meiosis due to crossing over and independent assortment, whereas mitosis produces cells that are clones of the parent cell, ensuring genetic consistency. Lastly, mitosis can occur in both diploid and haploid organisms, so stating that it occurs only in haploid organisms is misleading. Hence, the statement regarding the involvement of mitosis in growth and tissue repair is the true one.